semaphore - posix, osx, win32

Semaphore

Posix

#include <semaphore.h>

구조체

sem_t sem;

초기화

sem_init(&sem, 0, 1);

wait

sem_wait(&sem);

post

sem_post(&sem);

destroy

sem_destroy(&sem);

osx

#include <dispatch/dispatch.h>

구조체

dispatch_semaphore_t sem;

초기화

sem = dispatch_semaphore_create(1);

wait

dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);

post

dispatch_semaphore_signal(sem);

destory

API 없음

Windows

#include <Windows.h>

구조체

HANDLE sem;

초기화

sem = CreateSemaphore(NULL, 1, 1, NULL);

wait

WaitForSingleObject(sem, INFINITE);

post

ReleaseSemaphore(sem, 1, NULL);

destroy

CloseHandle(sem);