diff options
| -rw-r--r-- | libc/include/unistd.h | 2 | ||||
| -rw-r--r-- | libc/unistd/usleep.c | 11 |
2 files changed, 8 insertions, 5 deletions
diff --git a/libc/include/unistd.h b/libc/include/unistd.h index 67cb5fe..954f34e 100644 --- a/libc/include/unistd.h +++ b/libc/include/unistd.h @@ -145,7 +145,7 @@ extern int ftruncate(int, off_t); extern int pause(void); extern unsigned int alarm(unsigned int); extern unsigned int sleep(unsigned int); -extern void usleep(unsigned long); +extern int usleep(unsigned long); extern int gethostname(char *, size_t); extern int sethostname(const char *, size_t); diff --git a/libc/unistd/usleep.c b/libc/unistd/usleep.c index 75458b1..19e8ee8 100644 --- a/libc/unistd/usleep.c +++ b/libc/unistd/usleep.c @@ -28,7 +28,7 @@ #include <time.h> #include <errno.h> -void usleep(unsigned long usec) +int usleep(unsigned long usec) { struct timespec ts; @@ -43,10 +43,13 @@ void usleep(unsigned long usec) for (;;) { - if ( nanosleep( &ts, &ts ) >= 0 ) - break; + if ( nanosleep( &ts, &ts ) == 0 ) + return 0; + // We try again if the nanosleep failure is EINTR. + // The other possible failures are EINVAL (which we should pass through), + // and ENOSYS, which doesn't happen. if ( errno != EINTR ) - break; + return -1; } } |