Wildan M
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
// this file is both C and CPP to check NULL and thread_local on C++ environment
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#include <stdio.h>
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#include <pthread.h>
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#include <stddef.h>
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#include <assert.h>
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#include <threads.h>
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static pthread_cond_t global_cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_rwlock_t global_rwlock = PTHREAD_RWLOCK_INITIALIZER;
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// TODO: POSIX mandates *_INITIALIZER as const initializer but not PTHREAD_ONCE_INIT
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// But glibc and other platform support it. Ours cannot in C due to union type
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#ifdef __cplusplus
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static pthread_once_t global_once = PTHREAD_ONCE_INIT;
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#else
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static pthread_once_t global_once = {0};
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#endif
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static void once_callback(void) {
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printf("once\n");
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}
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static thread_local int tls_counter = 100;
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void* thread_func(void* args) {
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(void)args;
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assert(tls_counter == 100);
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tls_counter = 200;
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assert(tls_counter == 200);
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return NULL;
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}
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int main(void) {
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assert(pthread_mutex_lock(&global_mutex) == 0);
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assert(pthread_mutex_unlock(&global_mutex) == 0);
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assert(pthread_rwlock_wrlock(&global_rwlock) == 0);
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assert(pthread_rwlock_unlock(&global_rwlock) == 0);
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assert(pthread_once(&global_once, once_callback) == 0);
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assert(pthread_cond_signal(&global_cond) == 0);
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pthread_t thread_id;
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int create_res = pthread_create(&thread_id, NULL, thread_func, NULL);
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assert(create_res == 0);
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pthread_mutex_t dynamic_mutex;
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int mutex_res = pthread_mutex_init(&dynamic_mutex, NULL);
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assert(mutex_res == 0);
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assert(pthread_join(thread_id, NULL) == 0);
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assert(tls_counter == 100);
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return 0;
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}
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