?? sem_getvalue.c
字號:
/* include sem_getvalue */
#include "unpipc.h"
#include "semaphore.h"
int
mysem_getvalue(mysem_t *sem, int *pvalue)
{
int n;
if (sem->sem_magic != SEM_MAGIC) {
errno = EINVAL;
return(-1);
}
if ( (n = pthread_mutex_lock(&sem->sem_mutex)) != 0) {
errno = n;
return(-1);
}
*pvalue = sem->sem_count;
pthread_mutex_unlock(&sem->sem_mutex);
return(0);
}
/* end sem_getvalue */
void
Mysem_getvalue(mysem_t *sem, int *pvalue)
{
if (mysem_getvalue(sem, pvalue) == -1)
err_sys("mysem_getvalue error");
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -