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Add __builtin_expect where appropriate.

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This commit is contained in:
Ulrich Drepper 2003-03-18 00:31:30 +00:00
parent 0a8d800411
commit bd0fa4cefd
6 changed files with 146 additions and 154 deletions
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26
nptl/sysdeps/ia64/bits/atomic.h
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@ -76,20 +76,22 @@ typedef uintmax_t uatomic_max_t;
__val = *__memp; \
if (sizeof (*mem) == 4) \
do \
__oldval = __val; \
while ((__val \
= __arch_compare_and_exchange_32_val_acq (__memp, \
__oldval + __value, \
__oldval)) \
!= __oldval); \
{ \
__oldval = __val; \
__val = __arch_compare_and_exchange_32_val_acq (__memp, \
__oldval + __value, \
__oldval); \
} \
while (__builtin_expect (__val != __oldval, 0)); \
else if (sizeof (*mem) == 8) \
do \
__oldval = __val; \
while ((__val \
= __arch_compare_and_exchange_64_val_acq (__memp, \
__oldval + __value, \
__oldval)) \
!= __oldval); \
{ \
__oldval = __val; \
__val = __arch_compare_and_exchange_64_val_acq (__memp, \
__oldval + __value, \
__oldval); \
} \
while (__builtin_expect (__val != __oldval, 0)); \
else \
abort (); \
__oldval + __value; })

6
nptl/sysdeps/ia64/pthread_spin_unlock.c
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@ -17,15 +17,13 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* Ugly hack to avoid the declaration of pthread_spin_init. */
#define pthread_spin_init pthread_spin_init_XXX
#include "pthreadP.h"
#undef pthread_spin_init
int
pthread_spin_unlock (pthread_spinlock_t *lock)
{
*lock = 0;
__sync_lock_release_si ((int *) lock);
return 0;
}
strong_alias (pthread_spin_unlock, pthread_spin_init)

70
nptl/sysdeps/unix/sysv/linux/lowlevellock.c
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@ -27,9 +27,9 @@
void
__lll_lock_wait (int *futex, int val)
{
do {
lll_futex_wait (futex, val+1);
} while ((val = __lll_add (futex, 1)) != 0);
do
lll_futex_wait (futex, val + 1);
while ((val = __lll_add (futex, 1)) != 0);
*futex = 2;
}
hidden_proto (__lll_lock_wait)
@ -38,8 +38,6 @@ hidden_proto (__lll_lock_wait)
int
__lll_timedlock_wait (int *futex, int val, const struct timespec *abstime)
{
int err;
/* Reject invalid timeouts. */
if (abstime->tv_nsec >= 1000000000)
return EINVAL;
@ -48,33 +46,31 @@ __lll_timedlock_wait (int *futex, int val, const struct timespec *abstime)
{
struct timeval tv;
struct timespec rt;
int sec, nsec;
/* Get the current time. */
__gettimeofday (&tv, NULL);
(void) __gettimeofday (&tv, NULL);
/* Compute relative timeout. */
sec = abstime->tv_sec - tv.tv_sec;
nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (nsec < 0)
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
nsec += 1000000000;
--sec;
rt.tv_nsec += 1000000000;
--rt.tv_sec;
}
/* Already timed out? */
err = -ETIMEDOUT;
if (sec < 0)
break;
if (rt.tv_sec < 0)
return ETIMEDOUT;
/* Wait. */
rt.tv_sec = sec;
rt.tv_nsec = nsec;
err = lll_futex_timed_wait (futex, val+1, &rt);
} while (err == 0 && (val = __lll_add (futex, 1)) != 0);
if (lll_futex_timed_wait (futex, val + 1, &rt) == -ETIMEDOUT)
return ETIMEDOUT;
}
while ((val = __lll_add (futex, 1)) != 0);
*futex = 2;
return -err;
return 0;
}
hidden_proto (__lll_timedlock_wait)
@ -84,7 +80,9 @@ hidden_proto (__lll_timedlock_wait)
int
lll_unlock_wake_cb (int *futex)
{
__lll_add (futex, 1);
if (__lll_add (futex, 1) + 1 != 0)
lll_futex_wake (futex, 1);
return 0;
}
hidden_proto (lll_unlock_wake_cb)
@ -94,7 +92,6 @@ int
__lll_timedwait_tid (int *tidp, const struct timespec *abstime)
{
int tid;
int err = 0;
if (abstime == NULL || abstime->tv_nsec >= 1000000000)
return EINVAL;
@ -104,36 +101,29 @@ __lll_timedwait_tid (int *tidp, const struct timespec *abstime)
{
struct timeval tv;
struct timespec rt;
int sec, nsec;
/* Get the current time. */
__gettimeofday (&tv, NULL);
(void) __gettimeofday (&tv, NULL);
/* Compute relative timeout. */
sec = abstime->tv_sec - tv.tv_sec;
nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (nsec < 0)
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
nsec += 1000000000;
--sec;
rt.tv_nsec += 1000000000;
--rt.tv_sec;
}
/* Already timed out? */
err = -ETIMEDOUT;
if (sec < 0)
break;
/* Wait. */
rt.tv_sec = sec;
rt.tv_nsec = nsec;
if (rt.tv_sec < 0)
return ETIMEDOUT;
/* Wait until thread terminates. */
err = lll_futex_timed_wait (tidp, tid, &rt);
if (err != 0)
break;
if (lll_futex_timed_wait (tidp, tid, &rt) == -ETIMEDOUT)
return ETIMEDOUT;
}
return -err;
return 0;
}
hidden_proto (__lll_timedwait_tid)

196
nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
View File

@ -31,107 +31,107 @@
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
#define lll_futex_wait(futexp, val) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAIT, (val), 0); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
#define lll_futex_wait(futexp, val) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAIT, (val), 0); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
})
#define lll_futex_timed_wait(futexp, val, timespec) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAIT, (val), (timespec)); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
#define lll_futex_timed_wait(futexp, val, timespec) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAIT, (val), (timespec)); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
})
#define lll_futex_wake(futexp, nr) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAKE, (nr), 0); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
#define lll_futex_wake(futexp, nr) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
(futexp), FUTEX_WAKE, (nr), 0); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
})
#ifdef UP
#define __lll_acq_instr ""
#define __lll_rel_instr ""
# define __lll_acq_instr ""
# define __lll_rel_instr ""
#else
#define __lll_acq_instr "isync"
#define __lll_rel_instr "sync"
# define __lll_acq_instr "isync"
# define __lll_rel_instr "sync"
#endif
/* Set *futex to 1 if it is 0, atomically. Returns the old value */
#define __lll_trylock(futex) \
({ int __val; \
__asm __volatile ("1: lwarx %0,0,%2\n" \
" cmpwi 0,%0,0\n" \
" bne 2f\n" \
" stwcx. %3,0,%2\n" \
" bne- 1b\n" \
"2: " __lll_acq_instr \
: "=&r" (__val), "=m" (*futex) \
: "r" (futex), "r" (1), "1" (*futex) \
: "cr0", "memory"); \
__val; \
#define __lll_trylock(futex) \
({ int __val; \
__asm __volatile ("1: lwarx %0,0,%2\n" \
" cmpwi 0,%0,0\n" \
" bne 2f\n" \
" stwcx. %3,0,%2\n" \
" bne- 1b\n" \
"2: " __lll_acq_instr \
: "=&r" (__val), "=m" (*futex) \
: "r" (futex), "r" (1), "1" (*futex) \
: "cr0", "memory"); \
__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; \
#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; \
})
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); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__lll_lock_wait (__futex, __val); \
#define lll_mutex_lock(lock) \
(void) ({ \
int *__futex = &(lock); \
int __val = __lll_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__lll_lock_wait (__futex, __val); \
})
extern int __lll_timedlock_wait
(int *futex, int val, const struct timespec *) attribute_hidden;
#define lll_mutex_timedlock(lock, abstime) \
({ int *__futex = &(lock); \
int __val = __lll_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__val = __lll_timedlock_wait (__futex, __val, (abstime)); \
__val; \
#define lll_mutex_timedlock(lock, abstime) \
({ int *__futex = &(lock); \
int __val = __lll_add (__futex, 1); \
__asm __volatile (__lll_acq_instr ::: "memory"); \
if (__builtin_expect (__val != 0, 0)) \
__val = __lll_timedlock_wait (__futex, __val, (abstime)); \
__val; \
})
#define lll_mutex_unlock(lock) \
(void) ({ \
int *__futex = &(lock); \
__asm __volatile (__lll_rel_instr ::: "memory"); \
int __val = __lll_add (__futex, -1); \
if (__builtin_expect (__val != 1, 0)) \
{ \
*__futex = 0; \
lll_futex_wake (__futex, 1); \
} \
#define lll_mutex_unlock(lock) \
(void) ({ \
int *__futex = &(lock); \
__asm __volatile (__lll_rel_instr ::: "memory"); \
int __val = __lll_add (__futex, -1); \
if (__builtin_expect (__val != 1, 0)) \
{ \
*__futex = 0; \
lll_futex_wake (__futex, 1); \
} \
})
#define lll_mutex_islocked(futex) \
@ -164,39 +164,39 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
wakeup when the clone terminates. The memory location contains the
thread ID while the clone is running and is reset to zero
afterwards. */
#define lll_wait_tid(tid) \
do { \
__typeof (tid) __tid; \
while ((__tid = (tid)) != 0) \
lll_futex_wait (&(tid), __tid); \
#define lll_wait_tid(tid) \
do { \
__typeof (tid) __tid; \
while ((__tid = (tid)) != 0) \
lll_futex_wait (&(tid), __tid); \
} while (0)
extern int __lll_timedwait_tid (int *, const struct timespec *)
attribute_hidden;
#define lll_timedwait_tid(tid, abstime) \
({ \
int __res = 0; \
if ((tid) != 0) \
__res = __lll_timedwait_tid (&(tid), (abstime)); \
__res; \
#define lll_timedwait_tid(tid, abstime) \
({ \
int __res = 0; \
if ((tid) != 0) \
__res = __lll_timedwait_tid (&(tid), (abstime)); \
__res; \
})
/* 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; \
#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; \
})

1
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_spin_init.c Normal file
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@ -0,0 +1 @@
#include <nptl/sysdeps/x86_64/pthread_spin_init.c>

1
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_spin_unlock.S Normal file
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@ -0,0 +1 @@
#include <nptl/sysdeps/x86_64/pthread_spin_unlock.S>