lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-29 11:41:21 +03:00
Code Activity

Update.

Browse Source 
2003-03-20  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Include <atomic.h>.
	Remove __lll_add, __lll_dev_if_positive, and __lll_test_and_set
	definitions.  Replace uses with calls to atomic_* functions.
	* sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Likewise.
	* sysdeps/unix/sysv/linux/lowlevellock.c: Replace __lll_add and
	__lll_test_and_set calls with atomic_exchange_and_add and
	atomic_exchange calls respectively.
	* sysdeps/unix/sysv/linux/sem_post.c: Likewise.
	* sysdeps/unix/sysv/linux/sem_timedwait.c: Likewise.
	* sysdeps/unix/sysv/linux/sem_trywait.c: Likewise.
	* sysdeps/unix/sysv/linux/sem_wait.c: Likewise.
	* sysdeps/unix/sysv/linux/ia64/pthread_once.c: Likewise.
	* sysdeps/unix/sysv/linux/ia64/sem_port.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/pthread_once.c: Likewise.

	* allocatestack.c (allocate_stack): Assume atomic_exchange_and_add
	returns the old value.
This commit is contained in:
Ulrich Drepper
2003-03-20 10:29:20 +00:00
parent 9daba4f4b9
commit b1aea0989d
3 changed files with 28 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
View File

@ -23,6 +23,8 @@
#include <time.h>
#include <sys/param.h>
#include <bits/pthreadtypes.h>
#include <atomic.h>
#define __NR_futex 221
#define FUTEX_WAIT 0
@ -84,32 +86,7 @@
__val; \
})
#define lll_mutex_trylock(lock) __lll_trylock(&(lock))
/* Add inc to *futex atomically and return the old value. */
#define __lll_add(futex, inc) \
({ int __val, __tmp; \
__asm __volatile ("1: lwarx %0,0,%3\n" \
" addi %1,%0,%4\n" \
" stwcx. %1,0,%3\n" \
" bne- 1b" \
: "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
: "r" (futex), "I" (inc), "2" (*futex) \
: "cr0"); \
__val; \
})
/* Atomically store newval and return the old value. */
#define __lll_test_and_set(futex, newval) \
({ int __val; \
__asm __volatile (__lll_rel_instr "\n" \
"1: lwarx %0,0,%2\n" \
" stwcx. %3,0,%2\n" \
" bne- 1b" \
: "=&r" (__val), "=m" (*futex) \
: "r" (futex), "r" (newval), "1" (*futex) \
: "cr0", "memory"); \
__val; })
#define lll_mutex_trylock(lock) __lll_trylock (&(lock))
extern void __lll_lock_wait (int *futex, int val) attribute_hidden;
@ -117,7 +94,7 @@ extern void __lll_lock_wait (int *futex, int val) attribute_hidden;
#define lll_mutex_lock(lock) \
(void) ({ \
int *__futex = &(lock); \
int __val = __lll_add (__futex, 1); \
int __val = atomic_exchange_and_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__lll_lock_wait (__futex, __val); \
@ -128,7 +105,7 @@ extern int __lll_timedlock_wait
#define lll_mutex_timedlock(lock, abstime) \
({ int *__futex = &(lock); \
int __val = __lll_add (__futex, 1); \
int __val = atomic_exchange_and_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__val = __lll_timedlock_wait (__futex, __val, (abstime)); \
@ -138,7 +115,7 @@ extern int __lll_timedlock_wait
#define lll_mutex_unlock(lock) \
((void) ({ \
int *__futex = &(lock); \
int __val = __lll_test_and_set (__futex, 0); \
int __val = atomic_exchange (__futex, 0); \
if (__builtin_expect (__val > 1, 0)) \
lll_futex_wake (__futex, 1); \
}))
@ -192,23 +169,6 @@ extern int __lll_timedwait_tid (int *, const struct timespec *)
})
/* Decrement *futex if it is > 0, and return the old value */
#define __lll_dec_if_positive(futex) \
({ int __val, __tmp; \
__asm __volatile ("1: lwarx %0,0,%3\n" \
" cmpwi 0,%0,0\n" \
" addi %1,%0,-1\n" \
" ble 2f\n" \
" stwcx. %1,0,%3\n" \
" bne- 1b\n" \
"2: " __lll_acq_instr \
: "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
: "r" (futex), "2" (*futex) \
: "cr0"); \
__val; \
})
/* Conditional variable handling. */
extern void __lll_cond_wait (pthread_cond_t *cond)