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28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
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#include <errno.h>
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#include <pthread.h>
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#include <time.h>
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#include "musl_features.h"
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#include "syscall.h"
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int __clock_nanosleep(clockid_t clk, int flags, const struct timespec * req, struct timespec * rem)
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{
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if (clk == CLOCK_THREAD_CPUTIME_ID)
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return EINVAL;
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int old_cancel_type;
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int status;
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/// We cannot port __syscall_cp because musl has very limited cancellation point implementation.
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/// For example, c++ destructors won't get called and exception unwinding isn't implemented.
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/// Instead, we use normal __syscall here and turn on the asynchrous cancel mode to allow
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/// cancel. This works because nanosleep doesn't contain any resource allocations or
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/// deallocations.
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pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_cancel_type);
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if (clk == CLOCK_REALTIME && !flags)
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status = -__syscall(SYS_nanosleep, req, rem);
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else
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status = -__syscall(SYS_clock_nanosleep, clk, flags, req, rem);
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pthread_setcanceltype(old_cancel_type, NULL);
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return status;
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}
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weak_alias(__clock_nanosleep, clock_nanosleep);
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