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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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13
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
*/
#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;
@@ -28,9 +28,10 @@ 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)
{
@@ -55,11 +56,13 @@ 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);
}

20
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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Examples/concurrency/con2 Executable file
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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
*/
#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;
@@ -28,7 +28,8 @@ 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 < 100000000; j++)
{
@@ -49,7 +50,6 @@ void* thread_routine(void* args)
return NULL;
}
int main()
{
int val1 = 0;
@@ -57,11 +57,13 @@ 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);
}

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/con2.dSYM/Contents/Resources/DWARF/con2 Normal file
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11
Examples/concurrency/con3.c
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@@ -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;
@@ -30,7 +30,8 @@ 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 < 100000000; j++)
{
@@ -58,11 +59,13 @@ 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);
}

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
*/
#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;
@@ -32,7 +32,8 @@ 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 < 1000000; j++)
{
@@ -56,7 +57,6 @@ void* thread_routine(void* args)
return NULL;
}
int main()
{
int val1 = 0;
@@ -64,11 +64,13 @@ 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);
}

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/con4.dSYM/Contents/Resources/DWARF/con4 Normal file
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Examples/concurrency/con_dekkers Executable file
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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
*/
#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;
@@ -35,7 +35,8 @@ 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 < 1000000; j++)
{
@@ -47,7 +48,8 @@ void* thread_routine(void* args)
// just in case there is deadlock
flag[me] = 0;
}
while (turn == you);
while (turn == you)
;
flag[me] = 1;
}
// this is the critical section
@@ -63,7 +65,6 @@ void* thread_routine(void* args)
return NULL;
}
int main()
{
int val1 = 0;
@@ -71,11 +72,13 @@ 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);
}

20
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 Executable file
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Examples/concurrency/mutex1.c
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@@ -3,11 +3,11 @@
* 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;
@@ -29,7 +29,8 @@ 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 < 1000000; j++)
{
@@ -46,7 +47,6 @@ void* thread_routine(void* args)
return NULL;
}
// Main process
int main()
{
@@ -55,11 +55,13 @@ 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);
}

20
Examples/concurrency/mutex1.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.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 Executable file
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Examples/concurrency/mutex2.c
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@@ -4,11 +4,11 @@
* 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;
@@ -30,7 +30,8 @@ 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 < 1000000; j++)
{
@@ -41,7 +42,8 @@ void* thread_routine(void* args)
// leaving critical section
pthread_mutex_unlock(&flag);
if(me == 0) {
if (me == 0)
{
pthread_mutex_unlock(&flag);
}
}
@@ -51,7 +53,6 @@ void* thread_routine(void* args)
return NULL;
}
// Main process
int main()
{
@@ -60,11 +61,13 @@ 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);
}

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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Examples/concurrency/mutex2.dSYM/Contents/Resources/DWARF/mutex2 Normal file
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Examples/concurrency/mutex3.c
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@@ -4,11 +4,11 @@
* 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;
@@ -30,12 +30,14 @@ 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 < 1000000; j++)
{
pthread_mutex_lock(&flag);
if(me == 0) {
if (me == 0)
{
pthread_mutex_lock(&flag);
}
@@ -51,7 +53,6 @@ void* thread_routine(void* args)
return NULL;
}
// Main process
int main()
{
@@ -60,11 +61,13 @@ 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);
}

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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Examples/concurrency/mutex3.dSYM/Contents/Resources/DWARF/mutex3 Normal file
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Examples/concurrency/prod_cons1 Executable file
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Examples/concurrency/prod_cons1.c
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@@ -6,19 +6,20 @@
* 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 {
typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
@@ -35,7 +36,8 @@ void buffer_init(circular_buffer* b)
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");
exit(EXIT_FAILURE);
}
@@ -46,7 +48,8 @@ void buffer_insert(circular_buffer* b, unsigned char value)
unsigned char buffer_remove(circular_buffer *b)
{
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");
exit(EXIT_FAILURE);
}
@@ -62,9 +65,11 @@ volatile int start = 0;
void *producer()
{
// 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
unsigned char value = (i % 100) + 1; // Make sure the value isn't zero
buffer_insert(&buffer, value);
@@ -78,9 +83,11 @@ void* producer()
void *consumer()
{
// 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
printf("Consumer removed: %d\n", buffer_remove(&buffer));
}
@@ -88,7 +95,6 @@ void* consumer()
return NULL;
}
// Main process
int main()
{
@@ -96,11 +102,13 @@ int main()
pthread_t prod;
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");
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");
exit(EXIT_FAILURE);
}

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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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38
Examples/concurrency/prod_cons2.c
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@@ -7,19 +7,20 @@
* 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 {
typedef struct circular_buffer
{
unsigned char values[BUFFER_SIZE];
int out_idx;
int in_idx;
@@ -36,7 +37,8 @@ void buffer_init(circular_buffer* b)
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");
exit(EXIT_FAILURE);
}
@@ -47,7 +49,8 @@ void buffer_insert(circular_buffer* b, unsigned char value)
unsigned char buffer_remove(circular_buffer *b)
{
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");
exit(EXIT_FAILURE);
}
@@ -67,9 +70,11 @@ volatile int start = 0;
void *producer()
{
// 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
sem_wait(&emptyCount);
@@ -89,9 +94,11 @@ void* producer()
void *consumer()
{
// 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
sem_wait(&fullCount);
@@ -105,7 +112,6 @@ void* consumer()
return NULL;
}
// Main process
int main()
{
@@ -115,11 +121,13 @@ int main()
pthread_t prod;
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");
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");
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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14
Examples/concurrency/race.c
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@@ -1,14 +1,14 @@
/*
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;
@@ -25,7 +25,8 @@ 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 < 100000000; j++)
{
@@ -47,11 +48,13 @@ 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);
}
@@ -65,4 +68,3 @@ int main()
printf("counter2: %d\n", counter2);
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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14
Examples/concurrency/sem1.c
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@@ -3,12 +3,12 @@
* 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;
@@ -30,7 +30,8 @@ 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 < 1000000; j++)
{
@@ -47,7 +48,6 @@ void* thread_routine(void* args)
return NULL;
}
// Main process
int main()
{
@@ -59,11 +59,13 @@ 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);
}

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.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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Examples/concurrency/sem1.dSYM/Contents/Resources/DWARF/sem1 Normal file
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Examples/concurrency/sem2 Executable file
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17
Examples/concurrency/sem2.c
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@@ -4,12 +4,12 @@
* 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;
@@ -31,7 +31,8 @@ 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 < 100000000; j++)
{
@@ -42,7 +43,8 @@ void* thread_routine(void* args)
// leaving critical section
sem_post(&flag);
if(me == 0) {
if (me == 0)
{
sem_post(&flag);
}
}
@@ -52,7 +54,6 @@ void* thread_routine(void* args)
return NULL;
}
// Main process
int main()
{
@@ -63,11 +64,13 @@ 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);
}

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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28
Examples/concurrency/sem_list1.c
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@@ -3,19 +3,21 @@
* 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 {
typedef struct node
{
int val;
struct node *next;
} node;
typedef struct list {
typedef struct list
{
node *head;
} list;
@@ -31,7 +33,8 @@ void* thread_routine()
printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread
while(start == 0);
while (start == 0)
;
for (int j = 0; j < 1000000; j++)
{
@@ -55,8 +58,10 @@ int main()
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) {
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);
}
@@ -66,21 +71,24 @@ int main()
start = 1;
// 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);
}
// Count the elements in the list
int length = 0;
node *itr = mylist.head;
while(itr != NULL) {
while (itr != NULL)
{
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
// Free the list
while(mylist.head != NULL) {
while (mylist.head != NULL)
{
node *to_delete = mylist.head;
mylist.head = mylist.head->next;
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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30
Examples/concurrency/sem_list2.c
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@@ -1,21 +1,23 @@
/*
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 {
typedef struct node
{
int val;
struct node *next;
} node;
typedef struct list {
typedef struct list
{
node *head;
} list;
@@ -34,7 +36,8 @@ void* thread_routine()
printf("Worker thread: %lu ready\n", pthread_self());
// wait for start from master thread
while(start == 0);
while (start == 0)
;
for (int j = 0; j < 1000000; j++)
{
@@ -62,8 +65,10 @@ int main()
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) {
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);
}
@@ -73,21 +78,24 @@ int main()
start = 1;
// 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);
}
// Count the elements in the list
int length = 0;
node *itr = mylist.head;
while(itr != NULL) {
while (itr != NULL)
{
length++;
itr = itr->next;
}
printf("List contains %d elements\n", length);
// Free the list
while(mylist.head != NULL) {
while (mylist.head != NULL)
{
node *to_delete = mylist.head;
mylist.head = mylist.head->next;
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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