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powerpc: Add the lock elision using HTM

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This patch adds support for lock elision using ISA 2.07 hardware
transactional memory instructions for pthread_mutex primitives.
Similar to s390 version, the for elision logic defined in
'force-elision.h' is only enabled if ENABLE_LOCK_ELISION is defined.

Also, the lock elision code should be able to be built even with
a compiler that does not provide HTM support with builtins.
However I have noted the performance is sub-optimal due scheduling
pressures.
This commit is contained in:
Adhemerval Zanella 2014-11-07 12:25:32 -05:00
parent ec4fbd4800
commit 8d2c0a593b
17 changed files with 709 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
ChangeLog
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@ -1,3 +1,33 @@
2014-01-12 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/unix/sysv/linux/powerpc/Makefile [nptl]
(sysdep_routines): Add lock elision objects.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
[pthread_mutex_t] (__spins): Rework to add lock elision field.
[pthread_mutex_t] (__elision): Add field.
[__PTHREAD_SPINS]: Adjust to init lock elision field.
* sysdeps/unix/sysv/linux/powerpc/elision-conf.c: New file: lock
elision definitions for powerpc.
* sysdeps/unix/sysv/linux/powerpc/elision-lock.c: New file:
implementation of lock elision for powerpc.
* sysdeps/unix/sysv/linux/powerpc/elision-timed.c: New file:
implementation of timed lock elision for powerpc.
* sysdeps/unix/sysv/linux/powerpc/elision-trylock.c: New file:
implementation of trylock with lock elision for powerpc.
* sysdeps/unix/sysv/linux/powerpc/elision-unlock.c: New file:
implementaion of unlock for lock elision for powerpc.
* sysdeps/unix/sysv/linux/powerpc/force-elision.h: New file:
automatic enable lock elision for mutexes.
* sysdeps/unix/sysv/linux/powerpc/htm.h: New file: hardware
transaction execution definitions for powerpc.
* sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: New file: add TLE
definitions.
* sysdeps/unix/sysv/linux/powerpc/pthread_mutex_cond_lock.c: New file.
* sysdeps/unix/sysv/linux/powerpc/pthread_mutex_lock.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/pthread_mutex_timedlock.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/pthread_mutex_trylock.c: Likewise.
* NEWS: Update.
2015-01-09 Roland McGrath <roland@hack.frob.com> 2015-01-09 Roland McGrath <roland@hack.frob.com>
* sysdeps/posix/shm-directory.c: Use <> rather than "" * sysdeps/posix/shm-directory.c: Use <> rather than ""

7
NEWS
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@ -19,6 +19,13 @@ Version 2.21
17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781, 17782, 17791,
17793, 17796, 17797, 17806 17793, 17796, 17797, 17806
* Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
and powerpc64le. This may improve lock scaling of existing programs on
HTM capable systems. The lock elision code is only enabled with
--enable-lock-elision=yes. Also, the TSX lock elision implementation for
powerpc will issue a transaction abort on every syscall to avoid side
effects being visible outside transactions.
* Optimized strcpy, stpcpy, strchrnul and strrchr implementations for * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
AArch64. Contributed by ARM Ltd. AArch64. Contributed by ARM Ltd.

2
sysdeps/unix/sysv/linux/powerpc/Makefile
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@ -32,4 +32,6 @@ endif
ifeq ($(subdir),nptl) ifeq ($(subdir),nptl)
libpthread-routines += sysdep libpthread-routines += sysdep
libpthread-sysdep_routines += elision-lock elision-unlock elision-timed \
elision-trylock
endif endif

16
sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
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@ -90,14 +90,23 @@ typedef union
binary compatibility. */ binary compatibility. */
int __kind; int __kind;
#if __WORDSIZE == 64 #if __WORDSIZE == 64
int __spins; short __spins;
short __elision;
__pthread_list_t __list; __pthread_list_t __list;
# define __PTHREAD_MUTEX_HAVE_PREV 1 # define __PTHREAD_MUTEX_HAVE_PREV 1
# define __PTHREAD_SPINS 0, 0
#else #else
unsigned int __nusers; unsigned int __nusers;
__extension__ union __extension__ union
{ {
int __spins; struct
{
short __espins;
short __elision;
# define __spins __elision_data.__espins
# define __elision __elision_data.__elision
# define __PTHREAD_SPINS { 0, 0 }
} __elision_data;
__pthread_slist_t __list; __pthread_slist_t __list;
}; };
#endif #endif
@ -106,9 +115,6 @@ typedef union
long int __align; long int __align;
} pthread_mutex_t; } pthread_mutex_t;
/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */
#define __PTHREAD_SPINS 0
typedef union typedef union
{ {
char __size[__SIZEOF_PTHREAD_MUTEXATTR_T]; char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];

80
sysdeps/unix/sysv/linux/powerpc/elision-conf.c Normal file
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@ -0,0 +1,80 @@
/* elision-conf.c: Lock elision tunable parameters.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include <pthreadP.h>
#include <elision-conf.h>
#include <unistd.h>
#include <dl-procinfo.h>
/* Reasonable initial tuning values, may be revised in the future.
This is a conservative initial value. */
struct elision_config __elision_aconf =
{
/* How many times to use a non-transactional lock after a transactional
failure has occurred because the lock is already acquired. Expressed
in number of lock acquisition attempts. */
.skip_lock_busy = 3,
/* How often to not attempt to use elision if a transaction aborted due
to reasons other than other threads' memory accesses. Expressed in
number of lock acquisition attempts. */
.skip_lock_internal_abort = 3,
/* How often to not attempt to use elision if a lock used up all retries
without success. Expressed in number of lock acquisition attempts. */
.skip_lock_out_of_tbegin_retries = 3,
/* How often we retry using elision if there is chance for the transaction
to finish execution (e.g., it wasn't aborted due to the lock being
already acquired. */
.try_tbegin = 3,
/* Same as SKIP_LOCK_INTERNAL_ABORT but for trylock. */
.skip_trylock_internal_abort = 3,
};
/* Force elision for all new locks. This is used to decide whether existing
DEFAULT locks should be automatically use elision in pthread_mutex_lock().
Disabled for suid programs. Only used when elision is available. */
int __pthread_force_elision attribute_hidden;
/* Initialize elision. */
static void
elision_init (int argc __attribute__ ((unused)),
char **argv __attribute__ ((unused)),
char **environ)
{
#ifdef ENABLE_LOCK_ELISION
int elision_available = (GLRO (dl_hwcap2) & PPC_FEATURE2_HAS_HTM) ? 1 : 0;
__pthread_force_elision = __libc_enable_secure ? 0 : elision_available;
#endif
}
#ifdef SHARED
# define INIT_SECTION ".init_array"
# define MAYBE_CONST
#else
# define INIT_SECTION ".preinit_array"
# define MAYBE_CONST const
#endif
void (*MAYBE_CONST __pthread_init_array []) (int, char **, char **)
__attribute__ ((section (INIT_SECTION), aligned (sizeof (void *)))) =
{
&elision_init
};

42
sysdeps/unix/sysv/linux/powerpc/elision-conf.h Normal file
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@ -0,0 +1,42 @@
/* elision-conf.h: Lock elision tunable parameters.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _ELISION_CONF_H
#define _ELISION_CONF_H 1
#include <pthread.h>
#include <time.h>
/* Should make sure there is no false sharing on this. */
struct elision_config
{
int skip_lock_busy;
int skip_lock_internal_abort;
int skip_lock_out_of_tbegin_retries;
int try_tbegin;
int skip_trylock_internal_abort;
} __attribute__ ((__aligned__ (128)));
extern struct elision_config __elision_aconf attribute_hidden;
extern int __pthread_force_elision attribute_hidden;
/* Tell the test suite to test elision for this architecture. */
#define HAVE_ELISION 1
#endif

107
sysdeps/unix/sysv/linux/powerpc/elision-lock.c Normal file
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@ -0,0 +1,107 @@
/* elision-lock.c: Elided pthread mutex lock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <pthread.h>
#include <pthreadP.h>
#include <lowlevellock.h>
#include <elision-conf.h>
#include "htm.h"
/* PowerISA 2.0.7 Section B.5.5 defines isync to be insufficient as a
barrier in acquire mechanism for HTM operations, a strong 'sync' is
required. */
#undef __arch_compare_and_exchange_val_32_acq
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ \
__typeof (*(mem)) __tmp; \
__typeof (mem) __memp = (mem); \
__asm __volatile ( \
"1: lwarx %0,0,%1" MUTEX_HINT_ACQ "\n" \
" cmpw %0,%2\n" \
" bne 2f\n" \
" stwcx. %3,0,%1\n" \
" bne- 1b\n" \
"2: sync" \
: "=&r" (__tmp) \
: "b" (__memp), "r" (oldval), "r" (newval) \
: "cr0", "memory"); \
__tmp; \
})
#if !defined(LLL_LOCK) && !defined(EXTRAARG)
/* Make sure the configuration code is always linked in for static
libraries. */
#include "elision-conf.c"
#endif
#ifndef EXTRAARG
# define EXTRAARG
#endif
#ifndef LLL_LOCK
# define LLL_LOCK(a,b) lll_lock(a,b), 0
#endif
#define aconf __elision_aconf
/* Adaptive lock using transactions.
By default the lock region is run as a transaction, and when it
aborts or the lock is busy the lock adapts itself. */
int
__lll_lock_elision (int *lock, short *adapt_count, EXTRAARG int pshared)
{
if (*adapt_count > 0)
{
(*adapt_count)--;
goto use_lock;
}
int try_begin = aconf.try_tbegin;
while (1)
{
if (__builtin_tbegin (0))
{
if (*lock == 0)
return 0;
/* Lock was busy. Fall back to normal locking. */
__builtin_tabort (_ABORT_LOCK_BUSY);
}
else
{
/* A persistent failure indicates that a retry will probably
result in another failure. Use normal locking now and
for the next couple of calls. */
if (try_begin-- <= 0
|| _TEXASRU_FAILURE_PERSISTENT (__builtin_get_texasru ()))
{
if (aconf.skip_lock_internal_abort > 0)
*adapt_count = aconf.skip_lock_internal_abort;
goto use_lock;
}
/* Same logic as above, but for for a number of temporary failures
in a row. */
else if (aconf.skip_lock_out_of_tbegin_retries > 0
&& aconf.try_tbegin > 0)
*adapt_count = aconf.skip_lock_out_of_tbegin_retries;
}
}
use_lock:
return LLL_LOCK ((*lock), pshared);
}

28
sysdeps/unix/sysv/linux/powerpc/elision-timed.c Normal file
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@ -0,0 +1,28 @@
/* elision-timed.c: Lock elision timed lock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <time.h>
#include <elision-conf.h>
#include "lowlevellock.h"
#define __lll_lock_elision __lll_timedlock_elision
#define EXTRAARG const struct timespec *t,
#undef LLL_LOCK
#define LLL_LOCK(a, b) lll_timedlock(a, t, b)
#include "elision-lock.c"

68
sysdeps/unix/sysv/linux/powerpc/elision-trylock.c Normal file
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@ -0,0 +1,68 @@
/* elision-trylock.c: Lock eliding trylock for pthreads.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <pthreadP.h>
#include <lowlevellock.h>
#include <elision-conf.h>
#include "htm.h"
#define aconf __elision_aconf
/* Try to elide a futex trylock. FUTEX is the futex variable. ADAPT_COUNT is
the adaptation counter in the mutex. */
int
__lll_trylock_elision (int *futex, short *adapt_count)
{
/* Implement POSIX semantics by forbiding nesting elided trylocks. */
__builtin_tabort (_ABORT_NESTED_TRYLOCK);
/* Only try a transaction if it's worth it. */
if (*adapt_count > 0)
{
(*adapt_count)--;
goto use_lock;
}
if (__builtin_tbegin (0))
{
if (*futex == 0)
return 0;
/* Lock was busy. Fall back to normal locking. */
__builtin_tabort (_ABORT_LOCK_BUSY);
}
else
{
if (_TEXASRU_FAILURE_PERSISTENT (__builtin_get_texasru ()))
{
/* A persistent failure indicates that a retry will probably
result in another failure. Use normal locking now and
for the next couple of calls. */
if (aconf.skip_trylock_internal_abort > 0)
*adapt_count = aconf.skip_trylock_internal_abort;
}
if (aconf.skip_lock_busy > 0)
*adapt_count = aconf.skip_lock_busy;
}
use_lock:
return lll_trylock (*futex);
}

32
sysdeps/unix/sysv/linux/powerpc/elision-unlock.c Normal file
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@ -0,0 +1,32 @@
/* elision-unlock.c: Commit an elided pthread lock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "pthreadP.h"
#include "lowlevellock.h"
#include "htm.h"
int
__lll_unlock_elision(int *lock, int pshared)
{
/* When the lock was free we're in a transaction. */
if (*lock == 0)
__builtin_tend (0);
else
lll_unlock ((*lock), pshared);
return 0;
}

28
sysdeps/unix/sysv/linux/powerpc/force-elision.h Normal file
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@ -0,0 +1,28 @@
/* force-elision.h: Automatic enabling of elision for mutexes
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef ENABLE_LOCK_ELISION
/* Automatically enable elision for existing user lock kinds. */
#define FORCE_ELISION(m, s) \
if (__pthread_force_elision \
&& (m->__data.__kind & PTHREAD_MUTEX_ELISION_FLAGS_NP) == 0) \
{ \
mutex->__data.__kind |= PTHREAD_MUTEX_ELISION_NP; \
s; \
}
#endif

138
sysdeps/unix/sysv/linux/powerpc/htm.h Normal file
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@ -0,0 +1,138 @@
/* Shared HTM header. Emulate transactional execution facility intrinsics for
compilers and assemblers that do not support the intrinsics and instructions
yet.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _HTM_H
#define _HTM_H 1
#ifdef __ASSEMBLER__
/* tbegin. */
.macro TBEGIN
.long 0x7c00051d
.endm
/* tend. 0 */
.macro TEND
.long 0x7c00055d
.endm
/* tabort. code */
.macro TABORT code
.byte 0x7c
.byte \code
.byte 0x07
.byte 0x1d
.endm
/*"TEXASR - Transaction EXception And Summary Register"
mfspr %dst,130 */
.macro TEXASR dst
mfspr \dst,130
.endm
#else
#include <endian.h>
/* Official HTM intrinsics interface matching GCC, but works
on older GCC compatible compilers and binutils.
We should somehow detect if the compiler supports it, because
it may be able to generate slightly better code. */
#define TBEGIN ".long 0x7c00051d"
#define TEND ".long 0x7c00055d"
#if __BYTE_ORDER == __LITTLE_ENDIAN
# define TABORT ".byte 0x1d,0x07,%1,0x1d"
#else
# define TABORT ".byte 0x7c,%1,0x07,0x1d"
#endif
#define __force_inline inline __attribute__((__always_inline__))
#ifndef __HTM__
#define _TEXASRU_EXTRACT_BITS(TEXASR,BITNUM,SIZE) \
(((TEXASR) >> (31-(BITNUM))) & ((1<<(SIZE))-1))
#define _TEXASRU_FAILURE_PERSISTENT(TEXASRU) \
_TEXASRU_EXTRACT_BITS(TEXASRU, 7, 1)
#define _tbegin() \
({ unsigned int __ret; \
asm volatile ( \
TBEGIN "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : \
: "cr0", "memory"); \
__ret; \
})
#define _tend() \
({ unsigned int __ret; \
asm volatile ( \
TEND "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : \
: "cr0", "memory"); \
__ret; \
})
#define _tabort(__code) \
({ unsigned int __ret; \
asm volatile ( \
TABORT "\t\n" \
"mfcr %0\t\n" \
"rlwinm %0,%0,3,1\t\n" \
"xori %0,%0,1\t\n" \
: "=r" (__ret) : "r" (__code) \
: "cr0", "memory"); \
__ret; \
})
#define _texasru() \
({ unsigned long __ret; \
asm volatile ( \
"mfspr %0,131\t\n" \
: "=r" (__ret)); \
__ret; \
})
#define __builtin_tbegin(tdb) _tbegin ()
#define __builtin_tend(nested) _tend ()
#define __builtin_tabort(abortcode) _tabort (abortcode)
#define __builtin_get_texasru() _texasru ()
#else
# include <htmintrin.h>
#endif /* __HTM__ */
#endif /* __ASSEMBLER__ */
/* Definitions used for TEXASR Failure code (bits 0:6), they need to be even
because tabort. always sets the first bit. */
#define _ABORT_LOCK_BUSY 0x3f /* Lock already used. */
#define _ABORT_NESTED_TRYLOCK 0x3e /* Write operation in trylock. */
#define _ABORT_SYSCALL 0x3d /* Syscall issued. */
#endif

48
sysdeps/unix/sysv/linux/powerpc/lowlevellock.h Normal file
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@ -0,0 +1,48 @@
/* PowerPC specific lock definitions.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _POWERPC_LOWLEVELLOCK_H
#define _POWERPC_LOWLEVELLOCK_H 1
#include <sysdeps/nptl/lowlevellock.h>
/* Transactional lock elision definitions. */
extern int __lll_timedlock_elision
(int *futex, short *adapt_count, const struct timespec *timeout, int private)
attribute_hidden;
#define lll_timedlock_elision(futex, adapt_count, timeout, private) \
__lll_timedlock_elision(&(futex), &(adapt_count), timeout, private)
extern int __lll_lock_elision (int *futex, short *adapt_count, int private)
attribute_hidden;
extern int __lll_unlock_elision(int *lock, int private)
attribute_hidden;
extern int __lll_trylock_elision(int *lock, short *adapt_count)
attribute_hidden;
#define lll_lock_elision(futex, adapt_count, private) \
__lll_lock_elision (&(futex), &(adapt_count), private)
#define lll_unlock_elision(futex, private) \
__lll_unlock_elision (&(futex), private)
#define lll_trylock_elision(futex, adapt_count) \
__lll_trylock_elision (&(futex), &(adapt_count))
#endif

22
sysdeps/unix/sysv/linux/powerpc/pthread_mutex_cond_lock.c Normal file
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/* Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* The cond lock is not actually elided yet, but we still need to handle
already elided locks. */
#include <elision-conf.h>
#include <nptl/pthread_mutex_cond_lock.c>

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sysdeps/unix/sysv/linux/powerpc/pthread_mutex_lock.c Normal file
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/* Elided version of pthread_mutex_lock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <elision-conf.h>
#include <force-elision.h>
#include <nptl/pthread_mutex_lock.c>

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sysdeps/unix/sysv/linux/powerpc/pthread_mutex_timedlock.c Normal file
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/* Elided version of pthread_mutex_timedlock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <elision-conf.h>
#include <force-elision.h>
#include <nptl/pthread_mutex_timedlock.c>

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sysdeps/unix/sysv/linux/powerpc/pthread_mutex_trylock.c Normal file
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/* Elided version of pthread_mutex_trylock.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <elision-conf.h>
#include <force-elision.h>
#include <nptl/pthread_mutex_trylock.c>