#include <pthread.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <stdbool.h> #include <errno.h> #include <darwintest.h> struct context { pthread_mutex_t mutex; long value; long count; }; static void *test_thread(void *ptr) { int res; long old; struct context *context = ptr; int i = 0; char *str; do { bool try = i++ & 1; if (!try){ str = "pthread_mutex_lock"; res = pthread_mutex_lock(&context->mutex); } else { str = "pthread_mutex_trylock"; res = pthread_mutex_trylock(&context->mutex); } if (res != 0) { if (try && res == EBUSY) { continue; } T_ASSERT_POSIX_ZERO(res, "[%ld] %s", context->count, str); } old = __sync_fetch_and_or(&context->value, 1); if ((old & 1) != 0) { T_FAIL("[%ld] OR %lx\n", context->count, old); } old = __sync_fetch_and_and(&context->value, 0); if ((old & 1) == 0) { T_FAIL("[%ld] AND %lx\n", context->count, old); } res = pthread_mutex_unlock(&context->mutex); if (res) { T_ASSERT_POSIX_ZERO(res, "[%ld] pthread_mutex_lock", context->count); } } while (__sync_fetch_and_sub(&context->count, 1) > 0); T_PASS("thread completed successfully"); return NULL; } T_DECL(mutex, "pthread_mutex", T_META_ALL_VALID_ARCHS(YES)) { struct context context = { .mutex = PTHREAD_MUTEX_INITIALIZER, .value = 0, .count = 1000000, }; int i; int res; int threads = 8; pthread_t p[threads]; for (i = 0; i < threads; ++i) { res = pthread_create(&p[i], NULL, test_thread, &context); T_ASSERT_POSIX_ZERO(res, "pthread_create()"); } for (i = 0; i < threads; ++i) { res = pthread_join(p[i], NULL); T_ASSERT_POSIX_ZERO(res, "pthread_join()"); } }