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Refactor PI mutexes internal definitions

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This patch adds the generic futex_lock_pi and futex_unlock_pi to wrap
around the syscall machinery required to issue the syscall calls. It
simplifies a bit the futex code required to implement PI mutexes.

No function changes, checked on x86_64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2019-10-30 13:29:40 -03:00
parent fbb4a31437
commit 6b1472eb2e
7 changed files with 136 additions and 68 deletions
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6
nptl/pthread_mutex_unlock.c
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@ -22,6 +22,7 @@
#include "pthreadP.h"
#include <lowlevellock.h>
#include <stap-probe.h>
#include <futex-internal.h>
#ifndef lll_unlock_elision
#define lll_unlock_elision(a,b,c) ({ lll_unlock (a,c); 0; })
@ -277,9 +278,8 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
if (((l & FUTEX_WAITERS) != 0)
|| (l != THREAD_GETMEM (THREAD_SELF, tid)))
{
INTERNAL_SYSCALL_DECL (__err);
INTERNAL_SYSCALL (futex, __err, 2, &mutex->__data.__lock,
__lll_private_flag (FUTEX_UNLOCK_PI, private));
futex_unlock_pi ((unsigned int *) &mutex->__data.__lock,
private);
break;
}
}