| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * pause() 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 | #define __UCLIBC_HIDE_DEPRECATED__ |
| 11 | #include <sys/syscall.h> |
| 12 | #include <unistd.h> |
| 13 | |
| 14 | #ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 15 | #include <sysdep-cancel.h> |
| 16 | #endif |
| 17 | |
| 18 | #include <signal.h> |
| 19 | |
| 20 | /* Suspend the process until a signal arrives. |
| 21 | This always returns -1 and sets errno to EINTR. */ |
| 22 | extern __typeof(pause) __libc_pause; |
| 23 | int |
| 24 | __libc_pause (void) |
| 25 | { |
| 26 | sigset_t set; |
| 27 | |
| 28 | /*__sigemptyset (&set); - why? */ |
| 29 | sigprocmask (SIG_BLOCK, NULL, &set); |
| 30 | |
| 31 | /* pause is a cancellation point, but so is sigsuspend. |
| 32 | So no need for anything special here. */ |
| 33 | |
| 34 | return sigsuspend (&set); |
| 35 | } |
| 36 | weak_alias (__libc_pause, pause) |
| 37 | |
| 38 | #ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 39 | LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */ |
| 40 | #endif |
| 41 | |