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* sysdeps/unix/sysv/linux/s390/sem_wait.c (__new_sem_wait): Make
	cancelable.
	* sysdeps/unix/sysv/linux/s390/sem_timedwait.c (__sem_timedwait):
	Likewise.
This commit is contained in:
Ulrich Drepper 2003-06-08 16:30:17 +00:00
parent 3e36c37d35
commit ecf7955d55
4 changed files with 47 additions and 22 deletions
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2
nptl/Banner
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@ -1 +1 @@
NPTL 0.44 by Ulrich Drepper
NPTL 0.45 by Ulrich Drepper

5
nptl/ChangeLog
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@ -1,5 +1,10 @@
2003-06-08 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/s390/sem_wait.c (__new_sem_wait): Make
cancelable.
* sysdeps/unix/sysv/linux/s390/sem_timedwait.c (__sem_timedwait):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h: Remove
hand-written CFI generation code. Since ENTRY/END also initiated
CFI frames this caused two CFI sets to be generated.

32
nptl/sysdeps/unix/sysv/linux/s390/sem_timedwait.c
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@ -23,6 +23,7 @@
#include <internaltypes.h>
#include <semaphore.h>
#include <pthreadP.h>
#include <shlib-compat.h>
@ -31,12 +32,18 @@ sem_timedwait (sem, abstime)
sem_t *sem;
const struct timespec *abstime;
{
int oldval, newval;
/* First check for cancellation. */
CANCELLATION_P (THREAD_SELF);
while (1)
int *futex = (int *) sem;
int oldval;
int newval;
int err;
do
{
/* Atomically decrement semaphore counter if it is > 0. */
lll_compare_and_swap ((int *) sem, oldval, newval,
lll_compare_and_swap (futex, oldval, newval,
"ltr %2,%1; jnp 1f; ahi %2,-1");
/* oldval != newval if the semaphore count has been decremented. */
if (oldval != newval)
@ -69,8 +76,14 @@ sem_timedwait (sem, abstime)
return -1;
}
/* Enable asynchronous cancellation. Required by the standard. */
int oldtype = __pthread_enable_asynccancel ();
/* Do wait. */
int err = lll_futex_timed_wait ((int *) sem, 0, &rt);
err = lll_futex_timed_wait (futex, 0, &rt);
/* Disable asynchronous cancellation. */
__pthread_disable_asynccancel (oldtype);
/* Returned after timing out? */
if (err == -ETIMEDOUT)
@ -78,12 +91,9 @@ sem_timedwait (sem, abstime)
__set_errno (ETIMEDOUT);
return -1;
}
/* Handle EINTR. */
if (err != 0 && err != -EWOULDBLOCK)
{
__set_errno (-err);
return -1;
}
}
while (err == 0 || err == -EWOULDBLOCK)
__set_errno (-err);
return -1;
}

30
nptl/sysdeps/unix/sysv/linux/s390/sem_wait.c
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@ -23,35 +23,45 @@
#include <internaltypes.h>
#include <semaphore.h>
#include <pthreadP.h>
#include <shlib-compat.h>
int
__new_sem_wait (sem_t *sem)
{
while (1)
/* First check for cancellation. */
CANCELLATION_P (THREAD_SELF);
int *futex = (int *) sem;
int err;
do
{
int oldval;
int newval;
/* Atomically decrement semaphore counter if it is > 0. */
lll_compare_and_swap ((int *) sem, oldval, newval,
lll_compare_and_swap (futex, oldval, newval,
"ltr %2,%1; jnp 1f; ahi %2,-1");
/* oldval != newval if the semaphore count has been decremented. */
if (oldval != newval)
return 0;
/* Do wait. */
int err = lll_futex_wait ((int *) sem, 0);
/* Enable asynchronous cancellation. Required by the standard. */
int oldtype = __pthread_enable_asynccancel ();
/* Handle EINTR. */
if (err != 0 && err != -EWOULDBLOCK)
{
__set_errno (-err);
return -1;
}
/* Do wait. */
err = lll_futex_wait (futex, 0);
/* Disable asynchronous cancellation. */
__pthread_disable_asynccancel (oldtype);
}
while (err == 0 || err == -EWOULDBLOCK);
__set_errno (-err);
return -1;
}
versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1);