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/* * pause() for uClibc * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <sys/syscall.h> #include <unistd.h> #include <cancel.h> #ifdef __NR_pause /* even if it is not obvious, glibc uses the pause syscall, see syscalls.list */ # define __NR___pause_nocancel __NR_pause static _syscall0(int, __NC(pause)) CANCELLABLE_SYSCALL(int, pause, (void), ()) #else # define __need_NULL # include <stddef.h> # include <signal.h> int # ifdef __UCLIBC_HAS_LINUXTHREADS__ weak_function # endif __NC(pause)(void) { sigset_t set; /*__sigemptyset (&set); - why? */ sigprocmask (SIG_BLOCK, NULL, &set); /* pause is a cancellation point, but so is sigsuspend. So no need for anything special here. */ return sigsuspend(&set); } CANCELLABLE_SYSCALL(int, pause, (void), ()) LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */ #endif |