sem_clockwait函数是一个用于等待信号量的函数。它的主要作用是在获取信号量之前,先等待指定的时间。如果等待时间结束后仍然无法获取信号量,则函数返回错误码。 该函数通常用于需要等待一定时间才能获取信号量的应用场景,例如在多线程程序中,某些资源只能由一个线程占用,其他线程需要等待一段时间才能获取该资源。在这种情...
#include <semaphore.h> #include int sem_clockwait( sem_t *sem, clockid_tclk, const struct timespec *abstime); Arguments: sem The semaphore that you want to wait on. clk The clock against which the time limit is measured. The clock source is specified using theclkvariable. Theclkvaria...
ATF_REQUIRE_EQ(-1, sem_clockwait_np(&sem, CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, &remain)); ATF_REQUIRE_ERRNO(EINTR, 1); ATF_REQUIRE_MSG(got_sigalrm, "did not get SIGALRM"); ATF_REQUIRE_MSG(remain.tv_sec == 42 && remain.tv_nsec == 1000*1000*1000, ...
[3.9] bpo-41710: PyThread_acquire_lock_timed() uses sem_clockwait() (GH-28671)#28683 bpo-41710: Fix What's New Entry credit#28962 Files time_test.py Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state. ...