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This commit is contained in:
p-w-rs
2022-09-30 13:50:51 -05:00
parent 218bf07427
commit b927d70ba7
60 changed files with 793 additions and 433 deletions
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Examples/concurrency/con1 Executable file
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25
Examples/concurrency/con1.c
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@@ -4,11 +4,11 @@
* Also does not work if a process does not want to access the critical section * Also does not work if a process does not want to access the critical section
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -20,7 +20,7 @@ volatile int start = 0;
// turn flag // turn flag
volatile int turn = 0; volatile int turn = 0;
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *)args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
@@ -28,11 +28,12 @@ void* thread_routine(void* args)
printf("Worker thread: %d ready, you are %d\n", me, you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000; j++) for (int j = 0; j < 100000; j++)
{ {
while(turn != me) while (turn != me)
{ {
/* do nothing */ /* do nothing */
} }
@@ -55,21 +56,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

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Examples/concurrency/con1.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.con1</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/con1.dSYM/Contents/Resources/DWARF/con1 Normal file
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32
Examples/concurrency/con2.c
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@@ -4,11 +4,11 @@
* Due to race conditions with the flag array, it cannot guarentee mutual exclusion * Due to race conditions with the flag array, it cannot guarentee mutual exclusion
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -18,21 +18,22 @@ static int counter2 = 0;
volatile int start = 0; volatile int start = 0;
// flag array // flag array
volatile int flag[2] = {0,0}; volatile int flag[2] = {0, 0};
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 100000000; j++) for (int j = 0; j < 100000000; j++)
{ {
while(flag[you]) while (flag[you])
{ {
/* do nothing */ /* do nothing */
} }
@@ -44,12 +45,11 @@ void* thread_routine(void* args)
flag[me] = 0; flag[me] = 0;
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
int main() int main()
{ {
int val1 = 0; int val1 = 0;
@@ -57,21 +57,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

20
Examples/concurrency/con2.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.con2</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/con3.c
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@@ -6,11 +6,11 @@
* if both threads set the flag at the same time * if both threads set the flag at the same time
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -20,22 +20,23 @@ static int counter2 = 0;
volatile int start = 0; volatile int start = 0;
// flag array // flag array
volatile int flag[2] = {0,0}; volatile int flag[2] = {0, 0};
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 100000000; j++) for (int j = 0; j < 100000000; j++)
{ {
flag[me]=1; flag[me] = 1;
while(flag[you]) while (flag[you])
{ {
/* do nothing */ /* do nothing */
} }
@@ -43,10 +44,10 @@ void* thread_routine(void* args)
counter1++; counter1++;
counter2++; counter2++;
// leaving critical section // leaving critical section
flag[me]=0; flag[me] = 0;
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
@@ -58,21 +59,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

20
Examples/concurrency/con3.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.con3</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/con4.c
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@@ -7,11 +7,11 @@
* Prone to livelock since threads might be constantly releasing their flag * Prone to livelock since threads might be constantly releasing their flag
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -21,23 +21,24 @@ static int counter2 = 0;
volatile int start = 0; volatile int start = 0;
// flag array // flag array
volatile int flag[2] = {0,0}; volatile int flag[2] = {0, 0};
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
flag[me] = 1; flag[me] = 1;
while(flag[you]) while (flag[you])
{ {
// just in case there is deadlock // just in case there is deadlock
flag[me] = 0; flag[me] = 0;
@@ -51,12 +52,11 @@ void* thread_routine(void* args)
flag[me] = 0; flag[me] = 0;
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
int main() int main()
{ {
int val1 = 0; int val1 = 0;
@@ -64,21 +64,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

20
Examples/concurrency/con4.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.con4</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/con_dekkers.c
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@@ -7,11 +7,11 @@
* Also does not work on modern CPUs that perform out-of-order execution * Also does not work on modern CPUs that perform out-of-order execution
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -24,30 +24,32 @@ volatile int start = 0;
volatile int turn = 0; volatile int turn = 0;
// flag array // flag array
volatile int flag[2] = {0,0}; volatile int flag[2] = {0, 0};
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
flag[me] = 1; flag[me] = 1;
while(flag[you]) while (flag[you])
{ {
if(turn == you) if (turn == you)
{ {
// just in case there is deadlock // just in case there is deadlock
flag[me] = 0; flag[me] = 0;
} }
while (turn == you); while (turn == you)
;
flag[me] = 1; flag[me] = 1;
} }
// this is the critical section // this is the critical section
@@ -58,12 +60,11 @@ void* thread_routine(void* args)
flag[me] = 0; flag[me] = 0;
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
int main() int main()
{ {
int val1 = 0; int val1 = 0;
@@ -71,21 +72,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

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Examples/concurrency/con_dekkers.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.con_dekkers</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/con_dekkers.dSYM/Contents/Resources/DWARF/con_dekkers Normal file
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Examples/concurrency/mutex1.c
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@@ -3,11 +3,11 @@
* that increments two global variables * that increments two global variables
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -20,16 +20,17 @@ volatile int start;
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// The thread process // The thread process
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
@@ -41,12 +42,11 @@ void* thread_routine(void* args)
pthread_mutex_unlock(&flag); pthread_mutex_unlock(&flag);
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -55,22 +55,24 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag); pthread_mutex_destroy(&flag);
return EXIT_SUCCESS; return EXIT_SUCCESS;

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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.mutex1</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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Examples/concurrency/mutex2.c
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@@ -4,11 +4,11 @@
* unlocked * unlocked
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -21,16 +21,17 @@ volatile int start;
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// The thread process // The thread process
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
@@ -41,17 +42,17 @@ void* thread_routine(void* args)
// leaving critical section // leaving critical section
pthread_mutex_unlock(&flag); pthread_mutex_unlock(&flag);
if(me == 0) { if (me == 0)
{
pthread_mutex_unlock(&flag); pthread_mutex_unlock(&flag);
} }
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -60,22 +61,24 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag); pthread_mutex_destroy(&flag);
return EXIT_SUCCESS; return EXIT_SUCCESS;

20
Examples/concurrency/mutex2.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.mutex2</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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31
Examples/concurrency/mutex3.c
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@@ -4,11 +4,11 @@
* locked * locked
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -21,21 +21,23 @@ volatile int start;
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// The thread process // The thread process
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
pthread_mutex_lock(&flag); pthread_mutex_lock(&flag);
if(me == 0) { if (me == 0)
{
pthread_mutex_lock(&flag); pthread_mutex_lock(&flag);
} }
@@ -46,12 +48,11 @@ void* thread_routine(void* args)
pthread_mutex_unlock(&flag); pthread_mutex_unlock(&flag);
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -60,22 +61,24 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag); pthread_mutex_destroy(&flag);
return EXIT_SUCCESS; return EXIT_SUCCESS;

20
Examples/concurrency/mutex3.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.mutex3</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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52
Examples/concurrency/prod_cons1.c
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@@ -6,19 +6,20 @@
* a consumer might attempt to read when the space is empty * a consumer might attempt to read when the space is empty
*/ */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h> #include <pthread.h>
#include <semaphore.h> #include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#define BUFFER_SIZE 30 #define BUFFER_SIZE 30
#define ELEMENTS 100 #define ELEMENTS 100
// Shared Buffer // Shared Buffer
typedef struct circular_buffer { typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE]; unsigned char values[BUFFER_SIZE];
int out_idx; int out_idx;
int in_idx; int in_idx;
@@ -26,32 +27,34 @@ typedef struct circular_buffer {
circular_buffer buffer; circular_buffer buffer;
void buffer_init(circular_buffer* b) void buffer_init(circular_buffer *b)
{ {
b->out_idx = 0; b->out_idx = 0;
b->in_idx = 0; b->in_idx = 0;
memset(b->values, 0, BUFFER_SIZE); memset(b->values, 0, BUFFER_SIZE);
} }
void buffer_insert(circular_buffer* b, unsigned char value) void buffer_insert(circular_buffer *b, unsigned char value)
{ {
if(b->values[b->in_idx] != 0) { if (b->values[b->in_idx] != 0)
{
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n"); printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
b->values[b->in_idx] = value; b->values[b->in_idx] = value;
b->in_idx = b->in_idx < BUFFER_SIZE-1 ? b->in_idx + 1 : 0; b->in_idx = b->in_idx < BUFFER_SIZE - 1 ? b->in_idx + 1 : 0;
} }
unsigned char buffer_remove(circular_buffer* b) unsigned char buffer_remove(circular_buffer *b)
{ {
unsigned char return_value = b->values[b->out_idx]; unsigned char return_value = b->values[b->out_idx];
if(return_value == 0) { if (return_value == 0)
{
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n"); printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
b->values[b->out_idx] = 0; b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE-1 ? b->out_idx + 1 : 0; b->out_idx = b->out_idx < BUFFER_SIZE - 1 ? b->out_idx + 1 : 0;
return return_value; return return_value;
} }
@@ -59,12 +62,14 @@ unsigned char buffer_remove(circular_buffer* b)
volatile int start = 0; volatile int start = 0;
// Producer Routine // Producer Routine
void* producer() void *producer()
{ {
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for(int i = 0; i < ELEMENTS; i++) { for (int i = 0; i < ELEMENTS; i++)
{
// Add an element to the buffer // Add an element to the buffer
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value); buffer_insert(&buffer, value);
@@ -75,12 +80,14 @@ void* producer()
} }
// Consumer Routine // Consumer Routine
void* consumer() void *consumer()
{ {
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for(int i = 0; i < ELEMENTS; i++) { for (int i = 0; i < ELEMENTS; i++)
{
// Remove an element from the buffer // Remove an element from the buffer
printf("Consumer removed: %d\n", buffer_remove(&buffer)); printf("Consumer removed: %d\n", buffer_remove(&buffer));
} }
@@ -88,7 +95,6 @@ void* consumer()
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -96,11 +102,13 @@ int main()
pthread_t prod; pthread_t prod;
pthread_t cons; pthread_t cons;
if(pthread_create(&prod, NULL, producer, NULL) == -1) { if (pthread_create(&prod, NULL, producer, NULL) == -1)
{
printf("COULD NOT CREATE PRODUCER\n"); printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&cons, NULL, consumer, NULL) == -1) { if (pthread_create(&cons, NULL, consumer, NULL) == -1)
{
printf("COULD NOT CREATE CONSUMER\n"); printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }

20
Examples/concurrency/prod_cons1.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.prod_cons1</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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52
Examples/concurrency/prod_cons2.c
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@@ -7,19 +7,20 @@
* Consusmers wait for at least one filled spot before reading * Consusmers wait for at least one filled spot before reading
*/ */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h> #include <pthread.h>
#include <semaphore.h> #include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#define BUFFER_SIZE 30 #define BUFFER_SIZE 30
#define ELEMENTS 100 #define ELEMENTS 100
// Shared Buffer // Shared Buffer
typedef struct circular_buffer { typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE]; unsigned char values[BUFFER_SIZE];
int out_idx; int out_idx;
int in_idx; int in_idx;
@@ -27,32 +28,34 @@ typedef struct circular_buffer {
circular_buffer buffer; circular_buffer buffer;
void buffer_init(circular_buffer* b) void buffer_init(circular_buffer *b)
{ {
b->out_idx = 0; b->out_idx = 0;
b->in_idx = 0; b->in_idx = 0;
memset(b->values, 0, BUFFER_SIZE); memset(b->values, 0, BUFFER_SIZE);
} }
void buffer_insert(circular_buffer* b, unsigned char value) void buffer_insert(circular_buffer *b, unsigned char value)
{ {
if(b->values[b->in_idx] != 0) { if (b->values[b->in_idx] != 0)
{
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n"); printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
b->values[b->in_idx] = value; b->values[b->in_idx] = value;
b->in_idx = b->in_idx < BUFFER_SIZE-1 ? b->in_idx + 1 : 0; b->in_idx = b->in_idx < BUFFER_SIZE - 1 ? b->in_idx + 1 : 0;
} }
unsigned char buffer_remove(circular_buffer* b) unsigned char buffer_remove(circular_buffer *b)
{ {
unsigned char return_value = b->values[b->out_idx]; unsigned char return_value = b->values[b->out_idx];
if(return_value == 0) { if (return_value == 0)
{
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n"); printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
b->values[b->out_idx] = 0; b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE-1 ? b->out_idx + 1 : 0; b->out_idx = b->out_idx < BUFFER_SIZE - 1 ? b->out_idx + 1 : 0;
return return_value; return return_value;
} }
@@ -64,12 +67,14 @@ sem_t emptyCount;
volatile int start = 0; volatile int start = 0;
// Producer Routine // Producer Routine
void* producer() void *producer()
{ {
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for(int i = 0; i < ELEMENTS; i++) { for (int i = 0; i < ELEMENTS; i++)
{
// Wait for a free spot in the buffer // Wait for a free spot in the buffer
sem_wait(&emptyCount); sem_wait(&emptyCount);
@@ -86,12 +91,14 @@ void* producer()
} }
// Consumer Routine // Consumer Routine
void* consumer() void *consumer()
{ {
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for(int i = 0; i < ELEMENTS; i++) { for (int i = 0; i < ELEMENTS; i++)
{
// Wait for element to consume // Wait for element to consume
sem_wait(&fullCount); sem_wait(&fullCount);
@@ -105,7 +112,6 @@ void* consumer()
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -115,11 +121,13 @@ int main()
pthread_t prod; pthread_t prod;
pthread_t cons; pthread_t cons;
if(pthread_create(&prod, NULL, producer, NULL) == -1) { if (pthread_create(&prod, NULL, producer, NULL) == -1)
{
printf("COULD NOT CREATE PRODUCER\n"); printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&cons, NULL, consumer, NULL) == -1) { if (pthread_create(&cons, NULL, consumer, NULL) == -1)
{
printf("COULD NOT CREATE CONSUMER\n"); printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }

20
Examples/concurrency/prod_cons2.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.prod_cons2</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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30
Examples/concurrency/race.c
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@@ -1,23 +1,23 @@
/* s /*
* race.c - Shows the race condition that can happen * race.c - Shows the race condition that can happen
* then threads try to modify multiple global * then threads try to modify multiple global
* values at the same time * values at the same time
*/ */
#include <pthread.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
// start flag // start flag
volatile int start = 0; volatile int start = 0;
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
static int counter2 = 0; static int counter2 = 0;
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *)args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
@@ -25,7 +25,8 @@ void* thread_routine(void* args)
printf("Worker thread: %d ready, you are %d\n", me, you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 100000000; j++) for (int j = 0; j < 100000000; j++)
{ {
@@ -35,7 +36,7 @@ void* thread_routine(void* args)
// leaving critical section // leaving critical section
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
@@ -47,22 +48,23 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }

20
Examples/concurrency/race.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.race</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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30
Examples/concurrency/sem1.c
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@@ -3,12 +3,12 @@
* critical section * critical section
*/ */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -21,16 +21,17 @@ volatile int start;
sem_t flag; sem_t flag;
// The thread process // The thread process
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
@@ -42,12 +43,11 @@ void* thread_routine(void* args)
sem_post(&flag); sem_post(&flag);
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -59,22 +59,24 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
// Destroy the semaphore // Destroy the semaphore
sem_destroy(&flag); sem_destroy(&flag);

20
Examples/concurrency/sem1.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.sem1</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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33
Examples/concurrency/sem2.c
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@@ -4,12 +4,12 @@
* the count regardless of the current value * the count regardless of the current value
*/ */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
// shared global // shared global
static int counter1 = 0; static int counter1 = 0;
@@ -22,16 +22,17 @@ volatile int start;
sem_t flag; sem_t flag;
// The thread process // The thread process
void* thread_routine(void* args) void *thread_routine(void *args)
{ {
int me = *((int *) args); int me = *((int *)args);
int you = me ? 0 : 1; int you = me ? 0 : 1;
printf("Worker thread: %d ready, you are %d\n",me,you); printf("Worker thread: %d ready, you are %d\n", me, you);
// wait for start from master thread // wait for start from master thread
while(!start); while (!start)
;
for (int j = 0; j < 100000000; j++) for (int j = 0; j < 100000000; j++)
{ {
@@ -42,17 +43,17 @@ void* thread_routine(void* args)
// leaving critical section // leaving critical section
sem_post(&flag); sem_post(&flag);
if(me == 0) { if (me == 0)
{
sem_post(&flag); sem_post(&flag);
} }
} }
printf("Worker thread: %d done\n",me); printf("Worker thread: %d done\n", me);
return NULL; return NULL;
} }
// Main process // Main process
int main() int main()
{ {
@@ -63,22 +64,24 @@ int main()
pthread_t thr1; pthread_t thr1;
pthread_t thr2; pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) { if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) { if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
start = 1; start = 1;
pthread_join(thr1,NULL); pthread_join(thr1, NULL);
pthread_join(thr2,NULL); pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1); printf("counter1: %d\n", counter1);
printf("counter2: %d\n",counter2); printf("counter2: %d\n", counter2);
sem_destroy(&flag); sem_destroy(&flag);
return EXIT_SUCCESS; return EXIT_SUCCESS;

20
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.sem2</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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44
Examples/concurrency/sem_list1.c
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@@ -3,20 +3,22 @@
* uncontrolled access to a singly linked list * uncontrolled access to a singly linked list
*/ */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
typedef struct node { typedef struct node
{
int val; int val;
struct node* next; struct node *next;
} node; } node;
typedef struct list { typedef struct list
node* head; {
node *head;
} list; } list;
// shared global // shared global
@@ -26,16 +28,17 @@ static list mylist;
volatile int start = 0; volatile int start = 0;
// The thread process // The thread process
void* thread_routine() void *thread_routine()
{ {
printf("Worker thread: %lu ready\n", pthread_self()); printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread // wait for start from master thread
while(start == 0); while (start == 0)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
node* new_node = malloc(sizeof(node)); node *new_node = malloc(sizeof(node));
new_node->val = j; new_node->val = j;
new_node->next = mylist.head; new_node->next = mylist.head;
mylist.head = new_node; mylist.head = new_node;
@@ -49,14 +52,16 @@ void* thread_routine()
// Main process // Main process
int main() int main()
{ {
#define THREAD_COUNT 10 #define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT]; pthread_t thr_ids[THREAD_COUNT];
mylist.head = NULL; mylist.head = NULL;
// Create the threads // Create the threads
for(int i = 0; i < THREAD_COUNT; i++) { for (int i = 0; i < THREAD_COUNT; i++)
if(pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1) { {
if (pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
@@ -66,22 +71,25 @@ int main()
start = 1; start = 1;
// Wait for all threads to finish // Wait for all threads to finish
for(int i = 0; i < THREAD_COUNT; i++) { for (int i = 0; i < THREAD_COUNT; i++)
pthread_join(thr_ids[i],NULL); {
pthread_join(thr_ids[i], NULL);
} }
// Count the elements in the list // Count the elements in the list
int length = 0; int length = 0;
node* itr = mylist.head; node *itr = mylist.head;
while(itr != NULL) { while (itr != NULL)
{
length++; length++;
itr = itr->next; itr = itr->next;
} }
printf("List contains %d elements\n", length); printf("List contains %d elements\n", length);
// Free the list // Free the list
while(mylist.head != NULL) { while (mylist.head != NULL)
node* to_delete = mylist.head; {
node *to_delete = mylist.head;
mylist.head = mylist.head->next; mylist.head = mylist.head->next;
free(to_delete); free(to_delete);
} }

20
Examples/concurrency/sem_list1.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.sem_list1</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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46
Examples/concurrency/sem_list2.c
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@@ -1,22 +1,24 @@
/* s /*
* sem_list2.c - Uses a semaphore as a way to control access * sem_list2.c - Uses a semaphore as a way to control access
* to a critical section for a singly linked list * to a critical section for a singly linked list
*/ */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
typedef struct node { typedef struct node
{
int val; int val;
struct node* next; struct node *next;
} node; } node;
typedef struct list { typedef struct list
node* head; {
node *head;
} list; } list;
// shared global // shared global
@@ -29,17 +31,18 @@ volatile int start = 0;
sem_t flag; sem_t flag;
// The thread process // The thread process
void* thread_routine() void *thread_routine()
{ {
printf("Worker thread: %lu ready\n", pthread_self()); printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread // wait for start from master thread
while(start == 0); while (start == 0)
;
for (int j = 0; j < 1000000; j++) for (int j = 0; j < 1000000; j++)
{ {
sem_wait(&flag); sem_wait(&flag);
node* new_node = malloc(sizeof(node)); node *new_node = malloc(sizeof(node));
new_node->val = j; new_node->val = j;
new_node->next = mylist.head; new_node->next = mylist.head;
mylist.head = new_node; mylist.head = new_node;
@@ -56,14 +59,16 @@ int main()
{ {
sem_init(&flag, 0, 1); sem_init(&flag, 0, 1);
#define THREAD_COUNT 10 #define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT]; pthread_t thr_ids[THREAD_COUNT];
mylist.head = NULL; mylist.head = NULL;
// Create the threads // Create the threads
for(int i = 0; i < THREAD_COUNT; i++) { for (int i = 0; i < THREAD_COUNT; i++)
if(pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1) { {
if (pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1)
{
printf("COULD NOT CREATE A THREAD\n"); printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
@@ -73,22 +78,25 @@ int main()
start = 1; start = 1;
// Wait for all threads to finish // Wait for all threads to finish
for(int i = 0; i < THREAD_COUNT; i++) { for (int i = 0; i < THREAD_COUNT; i++)
pthread_join(thr_ids[i],NULL); {
pthread_join(thr_ids[i], NULL);
} }
// Count the elements in the list // Count the elements in the list
int length = 0; int length = 0;
node* itr = mylist.head; node *itr = mylist.head;
while(itr != NULL) { while (itr != NULL)
{
length++; length++;
itr = itr->next; itr = itr->next;
} }
printf("List contains %d elements\n", length); printf("List contains %d elements\n", length);
// Free the list // Free the list
while(mylist.head != NULL) { while (mylist.head != NULL)
node* to_delete = mylist.head; {
node *to_delete = mylist.head;
mylist.head = mylist.head->next; mylist.head = mylist.head->next;
free(to_delete); free(to_delete);
} }

20
Examples/concurrency/sem_list2.dSYM/Contents/Info.plist Normal file
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@@ -0,0 +1,20 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleIdentifier</key>
<string>com.apple.xcode.dsym.sem_list2</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>dSYM</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
</dict>
</plist>

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