diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h index 7e00fd01da..8ac8416011 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h @@ -73,6 +73,24 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; if (__result) \ __lll_mutex_lock_wait (__result, __futex); }) +/* Special version of lll_mutex_lock which causes the unlock function to + always wakeup waiters. */ +#define lll_mutex_cond_lock(futex) \ + (void) ({ int __result, val, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + mov r15,r1\n\ + mov #-6,r15\n\ + 0: mov.l @%2,%0\n\ + add %0,%1\n\ + mov.l %1,@%2\n\ + 1: mov r1,r15"\ + : "=&r" (__result), "=&r" (val) : "r" (__futex), "1" (2) \ + : "r0", "r1", "memory"); \ + if (__result) \ + __lll_mutex_lock_wait (__result, __futex); }) + #define lll_mutex_timedlock(futex, timeout) \ ({ int __result, val, *__futex = &(futex); \ __asm __volatile ("\ @@ -121,6 +139,46 @@ typedef int lll_lock_t; #define LLL_LOCK_INITIALIZER_LOCKED (0) +# ifdef NEED_SYSCALL_INST_PAD +# define SYSCALL_WITH_INST_PAD "\ + trapa #0x14; or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0" +# else +# define SYSCALL_WITH_INST_PAD "\ + trapa #0x14" +# endif + +#define lll_futex_wait(futex, val) \ + do { \ + int __ignore; \ + register unsigned long __r3 asm ("r3") = SYS_futex; \ + register unsigned long __r4 asm ("r4") = (unsigned long) (futex); \ + register unsigned long __r5 asm ("r5") = FUTEX_WAIT; \ + register unsigned long __r6 asm ("r6") = (unsigned long) (val); \ + register unsigned long __r7 asm ("r7") = 0; \ + __asm __volatile (SYSCALL_WITH_INST_PAD \ + : "=z" (__ignore) \ + : "r" (__r3), "r" (__r4), "r" (__r5), \ + "r" (__r6), "r" (__r7) \ + : "memory", "t"); \ + } while (0) + + +#define lll_futex_wake(futex, nr) \ + do { \ + int __ignore; \ + register unsigned long __r3 asm ("r3") = SYS_futex; \ + register unsigned long __r4 asm ("r4") = (unsigned long) (futex); \ + register unsigned long __r5 asm ("r5") = FUTEX_WAKE; \ + register unsigned long __r6 asm ("r6") = (unsigned long) (nr); \ + register unsigned long __r7 asm ("r7") = 0; \ + __asm __volatile (SYSCALL_WITH_INST_PAD \ + : "=z" (__ignore) \ + : "r" (__r3), "r" (__r4), "r" (__r5), \ + "r" (__r6), "r" (__r7) \ + : "memory", "t"); \ + } while (0) + + extern int __lll_lock_wait (int val, int *__futex) attribute_hidden; extern int __lll_unlock_wake (int *__futex) attribute_hidden; extern int lll_unlock_wake_cb (int *__futex) attribute_hidden; |