Merge branch 'master' of https://github.com/EliteTK/c-stuff

1 files changed, 45 insertions, 0 deletions

diff --git a/pthreads.c b/pthreads.c
new file mode 100644
index 0000000..87945fd
--- /dev/null
+++ b/pthreads.c
@@ -0,0 +1,45 @@
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define NUM_THREADS 100
+
+typedef void *(* thread_func)(void *);
+
+void *somefunction(int *arg)
+{
+	int loops = rand();
+
+	for (int i = 0; i < loops; i++) {
+		pthread_yield();
+		for (;i < loops; i++);
+	}
+
+	printf("%d:\t%d\n", *arg, loops);
+
+	return NULL;
+}
+
+int main(void)
+{
+	srand(time(NULL));
+
+	pthread_t threads[NUM_THREADS];
+	int args[NUM_THREADS];
+
+	for (int i = 0; i < NUM_THREADS; i++) {
+		args[i] = i;
+		if (pthread_create(&threads[i], NULL, (thread_func)somefunction, args + i))
+			return EXIT_FAILURE;
+	}
+
+	for (int i = 0; i < NUM_THREADS; i++)
+		if (pthread_join(threads[i], NULL))
+			return EXIT_FAILURE;
+
+	return EXIT_SUCCESS;
+}