trevorb98/CS3841
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sstuff

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

BIN
Examples/concurrency/con1 Executable file
View File

Binary file not shown.

25
Examples/concurrency/con1.c
View File

@@ -4,11 +4,11 @@
* Also does not work if a process does not want to access the critical section
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
@@ -20,7 +20,7 @@ volatile int start = 0;
// turn flag
volatile int turn = 0;
void* thread_routine(void* args)
void *thread_routine(void *args)
{
int me = *((int *)args);
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);
// 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 */
}
@@ -55,21 +56,23 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
return EXIT_SUCCESS;
}

20
Examples/concurrency/con1.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/con1.dSYM/Contents/Resources/DWARF/con1 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/con2 Executable file
View File

Binary file not shown.

32
Examples/concurrency/con2.c
View File

@@ -4,11 +4,11 @@
* Due to race conditions with the flag array, it cannot guarentee mutual exclusion
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
@@ -18,21 +18,22 @@ static int counter2 = 0;
volatile int start = 0;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 100000000; j++)
{
while(flag[you])
while (flag[you])
{
/* do nothing */
}
@@ -44,12 +45,11 @@ void* thread_routine(void* args)
flag[me] = 0;
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
int main()
{
int val1 = 0;
@@ -57,21 +57,23 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
return EXIT_SUCCESS;
}

20
Examples/concurrency/con2.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/con2.dSYM/Contents/Resources/DWARF/con2 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/con3 Executable file
View File

Binary file not shown.

35
Examples/concurrency/con3.c
View File

@@ -6,11 +6,11 @@
* if both threads set the flag at the same time
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
@@ -20,22 +20,23 @@ static int counter2 = 0;
volatile int start = 0;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 100000000; j++)
{
flag[me]=1;
while(flag[you])
flag[me] = 1;
while (flag[you])
{
/* do nothing */
}
@@ -43,10 +44,10 @@ void* thread_routine(void* args)
counter1++;
counter2++;
// 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;
}
@@ -58,21 +59,23 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
return EXIT_SUCCESS;
}

20
Examples/concurrency/con3.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/con3.dSYM/Contents/Resources/DWARF/con3 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/con4 Executable file
View File

Binary file not shown.

32
Examples/concurrency/con4.c
View File

@@ -7,11 +7,11 @@
* Prone to livelock since threads might be constantly releasing their flag
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
@@ -21,23 +21,24 @@ static int counter2 = 0;
volatile int start = 0;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 1000000; j++)
{
flag[me] = 1;
while(flag[you])
while (flag[you])
{
// just in case there is deadlock
flag[me] = 0;
@@ -51,12 +52,11 @@ void* thread_routine(void* args)
flag[me] = 0;
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
int main()
{
int val1 = 0;
@@ -64,21 +64,23 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
return EXIT_SUCCESS;
}

20
Examples/concurrency/con4.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/con4.dSYM/Contents/Resources/DWARF/con4 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/con_dekkers Executable file
View File

Binary file not shown.

37
Examples/concurrency/con_dekkers.c
View File

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

20
Examples/concurrency/con_dekkers.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/con_dekkers.dSYM/Contents/Resources/DWARF/con_dekkers Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/mutex1 Executable file
View File

Binary file not shown.

30
Examples/concurrency/mutex1.c
View File

@@ -3,33 +3,34 @@
* that increments two global variables
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
static int counter2 = 0;
// start flag
// start flag
volatile int start;
// flag mutex
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 1000000; j++)
{
@@ -41,12 +42,11 @@ void* thread_routine(void* args)
pthread_mutex_unlock(&flag);
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
// Main process
int main()
{
@@ -55,22 +55,24 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag);
return EXIT_SUCCESS;

20
Examples/concurrency/mutex1.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/mutex1.dSYM/Contents/Resources/DWARF/mutex1 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/mutex2 Executable file
View File

Binary file not shown.

33
Examples/concurrency/mutex2.c
View File

@@ -4,33 +4,34 @@
* unlocked
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
static int counter2 = 0;
// start flag
// start flag
volatile int start;
// flag mutex
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 1000000; j++)
{
@@ -41,17 +42,17 @@ void* thread_routine(void* args)
// leaving critical section
pthread_mutex_unlock(&flag);
if(me == 0) {
if (me == 0)
{
pthread_mutex_unlock(&flag);
}
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
// Main process
int main()
{
@@ -60,22 +61,24 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag);
return EXIT_SUCCESS;

20
Examples/concurrency/mutex2.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/mutex2.dSYM/Contents/Resources/DWARF/mutex2 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/mutex3 Executable file
View File

Binary file not shown.

33
Examples/concurrency/mutex3.c
View File

@@ -4,38 +4,40 @@
* locked
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// shared global
static int counter1 = 0;
static int counter2 = 0;
// start flag
// start flag
volatile int start;
// flag mutex
pthread_mutex_t flag = PTHREAD_MUTEX_INITIALIZER;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 1000000; j++)
{
pthread_mutex_lock(&flag);
if(me == 0) {
if (me == 0)
{
pthread_mutex_lock(&flag);
}
@@ -46,12 +48,11 @@ void* thread_routine(void* args)
pthread_mutex_unlock(&flag);
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
// Main process
int main()
{
@@ -60,22 +61,24 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
pthread_mutex_destroy(&flag);
return EXIT_SUCCESS;

20
Examples/concurrency/mutex3.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/mutex3.dSYM/Contents/Resources/DWARF/mutex3 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/prod_cons1 Executable file
View File

Binary file not shown.

136
Examples/concurrency/prod_cons1.c
View File

@@ -6,109 +6,117 @@
* 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 <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#define BUFFER_SIZE 30
#define ELEMENTS 100
// Shared Buffer
typedef struct circular_buffer {
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
} circular_buffer;
circular_buffer buffer;
void buffer_init(circular_buffer* b)
void buffer_init(circular_buffer *b)
{
b->out_idx = 0;
b->in_idx = 0;
memset(b->values, 0, BUFFER_SIZE);
b->out_idx = 0;
b->in_idx = 0;
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) {
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->in_idx] = value;
b->in_idx = b->in_idx < BUFFER_SIZE-1 ? b->in_idx + 1 : 0;
if (b->values[b->in_idx] != 0)
{
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->in_idx] = value;
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];
if(return_value == 0) {
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE-1 ? b->out_idx + 1 : 0;
return return_value;
unsigned char return_value = b->values[b->out_idx];
if (return_value == 0)
{
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE - 1 ? b->out_idx + 1 : 0;
return return_value;
}
// Start flag
volatile int start = 0;
// Producer Routine
void* producer()
void *producer()
{
// wait for start from master thread
while(!start);
// wait for start from master thread
while (!start)
;
for(int i = 0; i < ELEMENTS; i++) {
// Add an element to the buffer
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value);
printf("Producer added: %d\n", value);
}
for (int i = 0; i < ELEMENTS; i++)
{
// Add an element to the buffer
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value);
printf("Producer added: %d\n", value);
}
return NULL;
return NULL;
}
// Consumer Routine
void* consumer()
void *consumer()
{
// wait for start from master thread
while(!start);
// wait for start from master thread
while (!start)
;
for(int i = 0; i < ELEMENTS; i++) {
// Remove an element from the buffer
printf("Consumer removed: %d\n", buffer_remove(&buffer));
}
for (int i = 0; i < ELEMENTS; i++)
{
// Remove an element from the buffer
printf("Consumer removed: %d\n", buffer_remove(&buffer));
}
return NULL;
return NULL;
}
// Main process
int main()
{
buffer_init(&buffer);
pthread_t prod;
pthread_t cons;
if(pthread_create(&prod, NULL, producer, NULL) == -1) {
printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE);
}
if(pthread_create(&cons, NULL, consumer, NULL) == -1) {
printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE);
}
buffer_init(&buffer);
start = 1;
pthread_t prod;
pthread_t cons;
if (pthread_create(&prod, NULL, producer, NULL) == -1)
{
printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE);
}
if (pthread_create(&cons, NULL, consumer, NULL) == -1)
{
printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE);
}
pthread_join(prod, NULL);
pthread_join(cons, NULL);
start = 1;
return EXIT_SUCCESS;
pthread_join(prod, NULL);
pthread_join(cons, NULL);
return EXIT_SUCCESS;
}

20
Examples/concurrency/prod_cons1.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/prod_cons1.dSYM/Contents/Resources/DWARF/prod_cons1 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/prod_cons2 Executable file
View File

Binary file not shown.

160
Examples/concurrency/prod_cons2.c
View File

@@ -7,53 +7,56 @@
* 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 <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#define BUFFER_SIZE 30
#define ELEMENTS 100
// Shared Buffer
typedef struct circular_buffer {
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
} circular_buffer;
circular_buffer buffer;
void buffer_init(circular_buffer* b)
void buffer_init(circular_buffer *b)
{
b->out_idx = 0;
b->in_idx = 0;
memset(b->values, 0, BUFFER_SIZE);
b->out_idx = 0;
b->in_idx = 0;
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) {
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->in_idx] = value;
b->in_idx = b->in_idx < BUFFER_SIZE-1 ? b->in_idx + 1 : 0;
if (b->values[b->in_idx] != 0)
{
printf("ERROR: Inserting into buffer when an element exists. Empty was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->in_idx] = value;
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];
if(return_value == 0) {
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE-1 ? b->out_idx + 1 : 0;
return return_value;
unsigned char return_value = b->values[b->out_idx];
if (return_value == 0)
{
printf("ERROR: Removing from a buffer at an empty element. Something was expected\n");
exit(EXIT_FAILURE);
}
b->values[b->out_idx] = 0;
b->out_idx = b->out_idx < BUFFER_SIZE - 1 ? b->out_idx + 1 : 0;
return return_value;
}
// Semaphores for controlling access
@@ -64,73 +67,78 @@ sem_t emptyCount;
volatile int start = 0;
// Producer Routine
void* producer()
void *producer()
{
// wait for start from master thread
while(!start);
// wait for start from master thread
while (!start)
;
for(int i = 0; i < ELEMENTS; i++) {
// Wait for a free spot in the buffer
sem_wait(&emptyCount);
for (int i = 0; i < ELEMENTS; i++)
{
// Wait for a free spot in the buffer
sem_wait(&emptyCount);
// Add an element to the buffer
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value);
printf("Producer added: %d\n", value);
// Add an element to the buffer
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value);
printf("Producer added: %d\n", value);
// Signal the consumer that there something to consume
sem_post(&fullCount);
}
// Signal the consumer that there something to consume
sem_post(&fullCount);
}
return NULL;
return NULL;
}
// Consumer Routine
void* consumer()
void *consumer()
{
// wait for start from master thread
while(!start);
// wait for start from master thread
while (!start)
;
for(int i = 0; i < ELEMENTS; i++) {
// Wait for element to consume
sem_wait(&fullCount);
for (int i = 0; i < ELEMENTS; i++)
{
// Wait for element to consume
sem_wait(&fullCount);
// Remove an element from the buffer
printf("Consumer removed: %d\n", buffer_remove(&buffer));
// Remove an element from the buffer
printf("Consumer removed: %d\n", buffer_remove(&buffer));
// Signal the producer that there is a free spot
sem_post(&emptyCount);
}
// Signal the producer that there is a free spot
sem_post(&emptyCount);
}
return NULL;
return NULL;
}
// Main process
int main()
{
sem_init(&fullCount, 0, 0);
sem_init(&emptyCount, 0, BUFFER_SIZE);
buffer_init(&buffer);
pthread_t prod;
pthread_t cons;
if(pthread_create(&prod, NULL, producer, NULL) == -1) {
printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE);
}
if(pthread_create(&cons, NULL, consumer, NULL) == -1) {
printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE);
}
sem_init(&fullCount, 0, 0);
sem_init(&emptyCount, 0, BUFFER_SIZE);
buffer_init(&buffer);
start = 1;
pthread_t prod;
pthread_t cons;
if (pthread_create(&prod, NULL, producer, NULL) == -1)
{
printf("COULD NOT CREATE PRODUCER\n");
exit(EXIT_FAILURE);
}
if (pthread_create(&cons, NULL, consumer, NULL) == -1)
{
printf("COULD NOT CREATE CONSUMER\n");
exit(EXIT_FAILURE);
}
pthread_join(prod, NULL);
pthread_join(cons, NULL);
start = 1;
sem_destroy(&fullCount);
sem_destroy(&emptyCount);
pthread_join(prod, NULL);
pthread_join(cons, NULL);
return EXIT_SUCCESS;
sem_destroy(&fullCount);
sem_destroy(&emptyCount);
return EXIT_SUCCESS;
}

20
Examples/concurrency/prod_cons2.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/prod_cons2.dSYM/Contents/Resources/DWARF/prod_cons2 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/race Executable file
View File

Binary file not shown.

88
Examples/concurrency/race.c
View File

@@ -1,68 +1,70 @@
/*
* race.c - Shows the race condition that can happen
* then threads try to modify multiple global
* values at the same time
*/
s /*
* race.c - Shows the race condition that can happen
* then threads try to modify multiple global
* values at the same time
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
// start flag
volatile int start = 0;
// start flag
volatile int start = 0;
// shared global
static int counter1 = 0;
static int counter2 = 0;
void* thread_routine(void* args)
void *thread_routine(void *args)
{
int me = *((int *)args);
int you = me ? 0 : 1;
int me = *((int *)args);
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
while(!start);
// wait for start from master thread
while (!start)
;
for (int j = 0; j < 100000000; j++)
{
// this is the critical section
counter1++;
counter2++;
// leaving critical section
}
for (int j = 0; j < 100000000; j++)
{
// this is the critical section
counter1++;
counter2++;
// leaving critical section
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
return NULL;
}
int main()
{
int val1 = 0;
int val2 = 1;
pthread_t thr1;
pthread_t thr2;
if(pthread_create(&thr1, NULL, thread_routine, (void*)&val1) == -1) {
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
if(pthread_create(&thr2, NULL, thread_routine, (void*)&val2) == -1) {
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
int val1 = 0;
int val2 = 1;
start = 1;
pthread_t thr1;
pthread_t thr2;
if (pthread_create(&thr1, NULL, thread_routine, (void *)&val1) == -1)
{
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
if (pthread_create(&thr2, NULL, thread_routine, (void *)&val2) == -1)
{
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
start = 1;
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
return EXIT_SUCCESS;
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
return EXIT_SUCCESS;
}

20
Examples/concurrency/race.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/race.dSYM/Contents/Resources/DWARF/race Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/sem1 Executable file
View File

Binary file not shown.

34
Examples/concurrency/sem1.c
View File

@@ -3,34 +3,35 @@
* critical section
*/
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
// shared global
static int counter1 = 0;
static int counter2 = 0;
// start flag
// start flag
volatile int start;
// flag semaphore
sem_t flag;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 1000000; j++)
{
@@ -42,39 +43,40 @@ void* thread_routine(void* args)
sem_post(&flag);
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
// Main process
int main()
{
int val1 = 0;
int val2 = 1;
// Initialize the semaphore - initial value of 1
sem_init(&flag, 0, 1);
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
// Destroy the semaphore
sem_destroy(&flag);

20
Examples/concurrency/sem1.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/sem1.dSYM/Contents/Resources/DWARF/sem1 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/sem2 Executable file
View File

Binary file not shown.

35
Examples/concurrency/sem2.c
View File

@@ -4,34 +4,35 @@
* the count regardless of the current value
*/
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
// shared global
static int counter1 = 0;
static int counter2 = 0;
// start flag
// start flag
volatile int start;
// flag semaphore
sem_t flag;
// 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;
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
while(!start);
while (!start)
;
for (int j = 0; j < 100000000; j++)
{
@@ -42,17 +43,17 @@ void* thread_routine(void* args)
// leaving critical section
sem_post(&flag);
if(me == 0) {
if (me == 0)
{
sem_post(&flag);
}
}
printf("Worker thread: %d done\n",me);
printf("Worker thread: %d done\n", me);
return NULL;
}
// Main process
int main()
{
@@ -63,22 +64,24 @@ int main()
pthread_t thr1;
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");
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");
exit(EXIT_FAILURE);
}
start = 1;
pthread_join(thr1,NULL);
pthread_join(thr2,NULL);
pthread_join(thr1, NULL);
pthread_join(thr2, NULL);
printf("counter1: %d\n",counter1);
printf("counter2: %d\n",counter2);
printf("counter1: %d\n", counter1);
printf("counter2: %d\n", counter2);
sem_destroy(&flag);
return EXIT_SUCCESS;

20
Examples/concurrency/sem2.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/sem2.dSYM/Contents/Resources/DWARF/sem2 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/sem_list1 Executable file
View File

Binary file not shown.

100
Examples/concurrency/sem_list1.c
View File

@@ -3,20 +3,22 @@
* uncontrolled access to a singly linked list
*/
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
typedef struct node {
int val;
struct node* next;
typedef struct node
{
int val;
struct node *next;
} node;
typedef struct list {
node* head;
typedef struct list
{
node *head;
} list;
// shared global
@@ -26,65 +28,71 @@ static list mylist;
volatile int start = 0;
// The thread process
void* thread_routine()
void *thread_routine()
{
printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread
while(start == 0);
printf("Worker thread: %lu ready\n", pthread_self());
for (int j = 0; j < 1000000; j++)
{
node* new_node = malloc(sizeof(node));
new_node->val = j;
new_node->next = mylist.head;
mylist.head = new_node;
}
// wait for start from master thread
while (start == 0)
;
printf("Worker thread: %lu done\n", pthread_self());
for (int j = 0; j < 1000000; j++)
{
node *new_node = malloc(sizeof(node));
new_node->val = j;
new_node->next = mylist.head;
mylist.head = new_node;
}
return NULL;
printf("Worker thread: %lu done\n", pthread_self());
return NULL;
}
// Main process
int main()
{
#define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT];
#define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT];
mylist.head = NULL;
mylist.head = NULL;
// Create the threads
for(int i = 0; i < THREAD_COUNT; i++) {
if(pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1) {
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
}
for (int i = 0; i < THREAD_COUNT; i++)
{
if (pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1)
{
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
}
// Signal threads to start
start = 1;
start = 1;
// Wait for all threads to finish
for(int i = 0; i < THREAD_COUNT; i++) {
pthread_join(thr_ids[i],NULL);
}
for (int i = 0; i < THREAD_COUNT; i++)
{
pthread_join(thr_ids[i], NULL);
}
// Count the elements in the list
int length = 0;
node* itr = mylist.head;
while(itr != NULL) {
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
int length = 0;
node *itr = mylist.head;
while (itr != NULL)
{
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
// Free the list
while(mylist.head != NULL) {
node* to_delete = mylist.head;
while (mylist.head != NULL)
{
node *to_delete = mylist.head;
mylist.head = mylist.head->next;
free(to_delete);
}
}
return EXIT_SUCCESS;
return EXIT_SUCCESS;
}

20
Examples/concurrency/sem_list1.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/sem_list1.dSYM/Contents/Resources/DWARF/sem_list1 Normal file
View File

Binary file not shown.

BIN
Examples/concurrency/sem_list2 Executable file
View File

Binary file not shown.

116
Examples/concurrency/sem_list2.c
View File

@@ -1,22 +1,24 @@
/*
* sem_list2.c - Uses a semaphore as a way to control access
* to a critical section for a singly linked list
*/
s /*
* sem_list2.c - Uses a semaphore as a way to control access
* to a critical section for a singly linked list
*/
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
typedef struct node {
int val;
struct node* next;
typedef struct node
{
int val;
struct node *next;
} node;
typedef struct list {
node* head;
typedef struct list
{
node *head;
} list;
// shared global
@@ -29,71 +31,77 @@ volatile int start = 0;
sem_t flag;
// The thread process
void* thread_routine()
void *thread_routine()
{
printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread
while(start == 0);
printf("Worker thread: %lu ready\n", pthread_self());
for (int j = 0; j < 1000000; j++)
{
sem_wait(&flag);
node* new_node = malloc(sizeof(node));
new_node->val = j;
new_node->next = mylist.head;
mylist.head = new_node;
sem_post(&flag);
}
// wait for start from master thread
while (start == 0)
;
printf("Worker thread: %lu done\n", pthread_self());
for (int j = 0; j < 1000000; j++)
{
sem_wait(&flag);
node *new_node = malloc(sizeof(node));
new_node->val = j;
new_node->next = mylist.head;
mylist.head = new_node;
sem_post(&flag);
}
return NULL;
printf("Worker thread: %lu done\n", pthread_self());
return NULL;
}
// Main process
int main()
{
sem_init(&flag, 0, 1);
sem_init(&flag, 0, 1);
#define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT];
#define THREAD_COUNT 10
pthread_t thr_ids[THREAD_COUNT];
mylist.head = NULL;
mylist.head = NULL;
// Create the threads
for(int i = 0; i < THREAD_COUNT; i++) {
if(pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1) {
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
}
for (int i = 0; i < THREAD_COUNT; i++)
{
if (pthread_create(&thr_ids[i], NULL, thread_routine, NULL) == -1)
{
printf("COULD NOT CREATE A THREAD\n");
exit(EXIT_FAILURE);
}
}
// Signal threads to start
start = 1;
start = 1;
// Wait for all threads to finish
for(int i = 0; i < THREAD_COUNT; i++) {
pthread_join(thr_ids[i],NULL);
}
for (int i = 0; i < THREAD_COUNT; i++)
{
pthread_join(thr_ids[i], NULL);
}
// Count the elements in the list
int length = 0;
node* itr = mylist.head;
while(itr != NULL) {
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
int length = 0;
node *itr = mylist.head;
while (itr != NULL)
{
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
// Free the list
while(mylist.head != NULL) {
node* to_delete = mylist.head;
while (mylist.head != NULL)
{
node *to_delete = mylist.head;
mylist.head = mylist.head->next;
free(to_delete);
}
}
sem_destroy(&flag);
return EXIT_SUCCESS;
return EXIT_SUCCESS;
}

20
Examples/concurrency/sem_list2.dSYM/Contents/Info.plist Normal file
View File

@@ -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>

BIN
Examples/concurrency/sem_list2.dSYM/Contents/Resources/DWARF/sem_list2 Normal file
View File

Binary file not shown.