diff options
| author | Peter S. Mazinger <ps.m@gmx.net> | 2011-04-21 22:31:08 +0200 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2012-06-15 14:00:41 +0200 |
| commit | 08b258aeb96a6970b950eedc2dc2ab00b04011ee (patch) | |
| tree | 38a9bd354003b1599f644e2eeadce0f589c18877 | |
| parent | c4b9ff234e2d18ee51f652467986ed0102667737 (diff) | |
waitpid.c: provide __waitpid_nocancel, use cancel.h
Use __wait4_nocancel since wait4 is not available all the time.
Add a comment about not using waitpid syscall.
Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
| -rw-r--r-- | include/sys/wait.h | 3 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/waitpid.c | 32 |
2 files changed, 11 insertions, 24 deletions
diff --git a/include/sys/wait.h b/include/sys/wait.h index b09c28ddf..2b68847e9 100644 --- a/include/sys/wait.h +++ b/include/sys/wait.h @@ -137,7 +137,10 @@ extern __pid_t wait (__WAIT_STATUS __stat_loc); This function is a cancellation point and therefore not marked with __THROW. */ extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options); +#ifdef _LIBC +extern __typeof(waitpid) __waitpid_nocancel attribute_hidden; libc_hidden_proto(waitpid) +#endif #if defined __USE_SVID || defined __USE_XOPEN # define __need_siginfo_t diff --git a/libc/sysdeps/linux/common/waitpid.c b/libc/sysdeps/linux/common/waitpid.c index d0437194d..2309d5bb8 100644 --- a/libc/sysdeps/linux/common/waitpid.c +++ b/libc/sysdeps/linux/common/waitpid.c @@ -6,32 +6,16 @@ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ -#include <stdlib.h> -#include <sys/types.h> #include <sys/wait.h> -#include <sys/resource.h> +#include <cancel.h> -#ifdef __UCLIBC_HAS_THREADS_NATIVE__ -#include "sysdep-cancel.h" -#else -#define SINGLE_THREAD_P 1 -#endif - -libc_hidden_proto(wait4) - -extern __typeof(waitpid) __libc_waitpid; -__pid_t __libc_waitpid(__pid_t pid, int *wait_stat, int options) +pid_t __NC(waitpid)(pid_t pid, int *wait_stat, int options) { - if (SINGLE_THREAD_P) - return wait4(pid, wait_stat, options, NULL); - -#ifdef __UCLIBC_HAS_THREADS_NATIVE__ - int oldtype = LIBC_CANCEL_ASYNC (); - int result = wait4(pid, wait_stat, options, NULL); - LIBC_CANCEL_RESET (oldtype); - return result; +#if 1 /* kernel/exit.c says to avoid waitpid syscall */ + return __wait4_nocancel(pid, wait_stat, options, NULL); +#else + return INLINE_SYSCALL(waitpid, 3, pid, wait_stat, options); #endif } -libc_hidden_proto(waitpid) -weak_alias(__libc_waitpid,waitpid) -libc_hidden_weak(waitpid) +CANCELLABLE_SYSCALL(pid_t, waitpid, (pid_t pid, int *wait_stat, int options), (pid, wait_stat, options)) +lt_libc_hidden(waitpid) |