| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * alarm() for uClibc |
| 4 | * |
| 5 | * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> |
| 6 | * |
| 7 | * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| 8 | */ |
| 9 | |
| 10 | #include <sys/syscall.h> |
| 11 | #include <unistd.h> |
| 12 | |
| 13 | |
| 14 | #ifdef __NR_alarm |
| 15 | _syscall1(unsigned int, alarm, unsigned int, seconds) |
| 16 | #else |
| 17 | #include <sys/time.h> |
| 18 | |
| 19 | |
| 20 | unsigned int alarm(unsigned int seconds) |
| 21 | { |
| 22 | struct itimerval old, new; |
| 23 | unsigned int retval; |
| 24 | |
| 25 | new.it_value.tv_usec = 0; |
| 26 | new.it_interval.tv_sec = 0; |
| 27 | new.it_interval.tv_usec = 0; |
| 28 | new.it_value.tv_sec = (long int) seconds; |
| 29 | if (setitimer(ITIMER_REAL, &new, &old) < 0) { |
| 30 | return 0; |
| 31 | } |
| 32 | retval = old.it_value.tv_sec; |
| 33 | if (old.it_value.tv_usec) { |
| 34 | ++retval; |
| 35 | } |
| 36 | return retval; |
| 37 | } |
| 38 | #endif |
| 39 | libc_hidden_def(alarm) |