39 lines
979 B
C
39 lines
979 B
C
#include <pthread.h>
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#include <time.h>
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#include <errno.h>
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#include "futex.h"
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#include "syscall.h"
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int __timedwait(volatile int *addr, int val,
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clockid_t clk, const struct timespec *at,
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void (*cleanup)(void *), void *arg, int priv)
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{
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int r, cs;
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struct timespec to, *top=0;
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if (priv) priv = 128;
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if (at) {
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if (at->tv_nsec >= 1000000000UL) return EINVAL;
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if (clock_gettime(clk, &to)) return EINVAL;
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to.tv_sec = at->tv_sec - to.tv_sec;
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if ((to.tv_nsec = at->tv_nsec - to.tv_nsec) < 0) {
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to.tv_sec--;
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to.tv_nsec += 1000000000;
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}
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if (to.tv_sec < 0) return ETIMEDOUT;
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top = &to;
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}
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if (!cleanup) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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pthread_cleanup_push(cleanup, arg);
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r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT|priv, val, top);
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if (r == ENOSYS) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT, val, top);
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if (r != EINTR && r != ETIMEDOUT) r = 0;
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pthread_cleanup_pop(0);
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if (!cleanup) pthread_setcancelstate(cs, 0);
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return r;
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}
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