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Commit 46a3afb3 authored by Davi Arnaut's avatar Davi Arnaut
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Bug#22320: my_atomic-t unit test fails 

The atomic operations implementation on 5.1 has a few problems,
which might cause tests to abort randomly. Since no code in 5.1
uses atomic operations, simply remove the code.
parent 5787f0f2
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include/Makefile.am
View file @ 46a3afb3
...@@ -36,10 +36,8 @@ noinst_HEADERS = config-win.h config-netware.h my_bit.h \ ...@@ -36,10 +36,8 @@ noinst_HEADERS = config-win.h config-netware.h my_bit.h \
my_nosys.h my_alarm.h queues.h rijndael.h sha1.h \ my_nosys.h my_alarm.h queues.h rijndael.h sha1.h \
my_aes.h my_tree.h my_trie.h hash.h thr_alarm.h \ my_aes.h my_tree.h my_trie.h hash.h thr_alarm.h \
thr_lock.h t_ctype.h violite.h my_md5.h base64.h \ thr_lock.h t_ctype.h violite.h my_md5.h base64.h \
my_handler.h my_time.h \ my_handler.h my_time.h my_vle.h my_user.h \
my_vle.h my_user.h my_atomic.h atomic/nolock.h \ my_libwrap.h my_stacktrace.h
atomic/rwlock.h atomic/x86-gcc.h atomic/x86-msvc.h \
atomic/gcc_builtins.h my_libwrap.h my_stacktrace.h
EXTRA_DIST = mysql.h.pp mysql/plugin.h.pp EXTRA_DIST = mysql.h.pp mysql/plugin.h.pp
......
include/atomic/gcc_builtins.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2008 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#define make_atomic_add_body(S) \
v= __sync_fetch_and_add(a, v);
#define make_atomic_swap_body(S) \
v= __sync_lock_test_and_set(a, v);
#define make_atomic_cas_body(S) \
int ## S sav; \
sav= __sync_val_compare_and_swap(a, *cmp, set); \
if (!(ret= (sav == *cmp))) *cmp= sav;
#ifdef MY_ATOMIC_MODE_DUMMY
#define make_atomic_load_body(S) ret= *a
#define make_atomic_store_body(S) *a= v
#else
#define make_atomic_load_body(S) \
ret= __sync_fetch_and_or(a, 0);
#define make_atomic_store_body(S) \
(void) __sync_lock_test_and_set(a, v);
#endif
include/atomic/nolock.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#if defined(__i386__) || defined(_M_IX86) || defined(HAVE_GCC_ATOMIC_BUILTINS)
#ifdef MY_ATOMIC_MODE_DUMMY
# define LOCK ""
#else
# define LOCK "lock"
#endif
#ifdef HAVE_GCC_ATOMIC_BUILTINS
#include "gcc_builtins.h"
#elif __GNUC__
#include "x86-gcc.h"
#elif defined(_MSC_VER)
#include "x86-msvc.h"
#endif
#endif
#ifdef make_atomic_cas_body
typedef struct { } my_atomic_rwlock_t;
#define my_atomic_rwlock_destroy(name)
#define my_atomic_rwlock_init(name)
#define my_atomic_rwlock_rdlock(name)
#define my_atomic_rwlock_wrlock(name)
#define my_atomic_rwlock_rdunlock(name)
#define my_atomic_rwlock_wrunlock(name)
#endif
include/atomic/rwlock.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
typedef struct {pthread_rwlock_t rw;} my_atomic_rwlock_t;
#ifdef MY_ATOMIC_MODE_DUMMY
/*
the following can never be enabled by ./configure, one need to put #define in
a source to trigger the following warning. The resulting code will be broken,
it only makes sense to do it to see now test_atomic detects broken
implementations (another way is to run a UP build on an SMP box).
*/
#warning MY_ATOMIC_MODE_DUMMY and MY_ATOMIC_MODE_RWLOCKS are incompatible
#define my_atomic_rwlock_destroy(name)
#define my_atomic_rwlock_init(name)
#define my_atomic_rwlock_rdlock(name)
#define my_atomic_rwlock_wrlock(name)
#define my_atomic_rwlock_rdunlock(name)
#define my_atomic_rwlock_wrunlock(name)
#define MY_ATOMIC_MODE "dummy (non-atomic)"
#else
#define my_atomic_rwlock_destroy(name) pthread_rwlock_destroy(& (name)->rw)
#define my_atomic_rwlock_init(name) pthread_rwlock_init(& (name)->rw, 0)
#define my_atomic_rwlock_rdlock(name) pthread_rwlock_rdlock(& (name)->rw)
#define my_atomic_rwlock_wrlock(name) pthread_rwlock_wrlock(& (name)->rw)
#define my_atomic_rwlock_rdunlock(name) pthread_rwlock_unlock(& (name)->rw)
#define my_atomic_rwlock_wrunlock(name) pthread_rwlock_unlock(& (name)->rw)
#define MY_ATOMIC_MODE "rwlocks"
#endif
#define make_atomic_add_body(S) int ## S sav; sav= *a; *a+= v; v=sav;
#define make_atomic_swap_body(S) int ## S sav; sav= *a; *a= v; v=sav;
#define make_atomic_cas_body(S) if ((ret= (*a == *cmp))) *a= set; else *cmp=*a;
#define make_atomic_load_body(S) ret= *a;
#define make_atomic_store_body(S) *a= v;
include/atomic/x86-gcc.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
XXX 64-bit atomic operations can be implemented using
cmpxchg8b, if necessary. Though I've heard that not all 64-bit
architectures support double-word (128-bit) cas.
*/
#ifdef MY_ATOMIC_NO_XADD
#define MY_ATOMIC_MODE "gcc-x86" LOCK "-no-xadd"
#else
#define MY_ATOMIC_MODE "gcc-x86" LOCK
#endif
/* fix -ansi errors while maintaining readability */
#ifndef asm
#define asm __asm__
#endif
#ifndef MY_ATOMIC_NO_XADD
#define make_atomic_add_body(S) \
asm volatile (LOCK "; xadd %0, %1;" : "+r" (v) , "+m" (*a))
#endif
#define make_atomic_swap_body(S) \
asm volatile ("; xchg %0, %1;" : "+r" (v) , "+m" (*a))
#define make_atomic_cas_body(S) \
asm volatile (LOCK "; cmpxchg %3, %0; setz %2;" \
: "+m" (*a), "+a" (*cmp), "=q" (ret): "r" (set))
#ifdef MY_ATOMIC_MODE_DUMMY
#define make_atomic_load_body(S) ret=*a
#define make_atomic_store_body(S) *a=v
#else
/*
Actually 32-bit reads/writes are always atomic on x86
But we add LOCK here anyway to force memory barriers
*/
#define make_atomic_load_body(S) \
ret=0; \
asm volatile (LOCK "; cmpxchg %2, %0" \
: "+m" (*a), "+a" (ret): "r" (ret))
#define make_atomic_store_body(S) \
asm volatile ("; xchg %0, %1;" : "+m" (*a) : "r" (v))
#endif
include/atomic/x86-msvc.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
XXX 64-bit atomic operations can be implemented using
cmpxchg8b, if necessary
*/
// Would it be better to use intrinsics ?
// (InterlockedCompareExchange, InterlockedCompareExchange16
// InterlockedExchangeAdd, InterlockedExchange)
#ifndef _atomic_h_cleanup_
#define _atomic_h_cleanup_ "atomic/x86-msvc.h"
#define MY_ATOMIC_MODE "msvc-x86" LOCK
#define make_atomic_add_body(S) \
_asm { \
_asm mov reg_ ## S, v \
_asm LOCK xadd *a, reg_ ## S \
_asm movzx v, reg_ ## S \
}
#define make_atomic_cas_body(S) \
_asm { \
_asm mov areg_ ## S, *cmp \
_asm mov reg2_ ## S, set \
_asm LOCK cmpxchg *a, reg2_ ## S \
_asm mov *cmp, areg_ ## S \
_asm setz al \
_asm movzx ret, al \
}
#define make_atomic_swap_body(S) \
_asm { \
_asm mov reg_ ## S, v \
_asm xchg *a, reg_ ## S \
_asm mov v, reg_ ## S \
}
#ifdef MY_ATOMIC_MODE_DUMMY
#define make_atomic_load_body(S) ret=*a
#define make_atomic_store_body(S) *a=v
#else
/*
Actually 32-bit reads/writes are always atomic on x86
But we add LOCK here anyway to force memory barriers
*/
#define make_atomic_load_body(S) \
_asm { \
_asm mov areg_ ## S, 0 \
_asm mov reg2_ ## S, areg_ ## S \
_asm LOCK cmpxchg *a, reg2_ ## S \
_asm mov ret, areg_ ## S \
}
#define make_atomic_store_body(S) \
_asm { \
_asm mov reg_ ## S, v \
_asm xchg *a, reg_ ## S \
}
#endif
#define reg_8 al
#define reg_16 ax
#define reg_32 eax
#define areg_8 al
#define areg_16 ax
#define areg_32 eax
#define reg2_8 bl
#define reg2_16 bx
#define reg2_32 ebx
#else /* cleanup */
#undef reg_8
#undef reg_16
#undef reg_32
#undef areg_8
#undef areg_16
#undef areg_32
#undef reg2_8
#undef reg2_16
#undef reg2_32
#endif
include/my_atomic.h deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef my_atomic_rwlock_init
#define intptr void *
#ifndef MY_ATOMIC_MODE_RWLOCKS
#include "atomic/nolock.h"
#endif
#ifndef make_atomic_cas_body
#include "atomic/rwlock.h"
#endif
#ifndef make_atomic_add_body
#define make_atomic_add_body(S) \
int ## S tmp=*a; \
while (!my_atomic_cas ## S(a, &tmp, tmp+v)); \
v=tmp;
#endif
#ifdef HAVE_INLINE
#define make_atomic_add(S) \
STATIC_INLINE int ## S my_atomic_add ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_add_body(S); \
return v; \
}
#define make_atomic_swap(S) \
STATIC_INLINE int ## S my_atomic_swap ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_swap_body(S); \
return v; \
}
#define make_atomic_cas(S) \
STATIC_INLINE int my_atomic_cas ## S(int ## S volatile *a, \
int ## S *cmp, int ## S set) \
{ \
int8 ret; \
make_atomic_cas_body(S); \
return ret; \
}
#define make_atomic_load(S) \
STATIC_INLINE int ## S my_atomic_load ## S(int ## S volatile *a) \
{ \
int ## S ret; \
make_atomic_load_body(S); \
return ret; \
}
#define make_atomic_store(S) \
STATIC_INLINE void my_atomic_store ## S( \
int ## S volatile *a, int ## S v) \
{ \
make_atomic_store_body(S); \
}
#else /* no inline functions */
#define make_atomic_add(S) \
extern int ## S my_atomic_add ## S(int ## S volatile *a, int ## S v);
#define make_atomic_swap(S) \
extern int ## S my_atomic_swap ## S(int ## S volatile *a, int ## S v);
#define make_atomic_cas(S) \
extern int my_atomic_cas ## S(int ## S volatile *a, int ## S *cmp, int ## S set);
#define make_atomic_load(S) \
extern int ## S my_atomic_load ## S(int ## S volatile *a);
#define make_atomic_store(S) \
extern void my_atomic_store ## S(int ## S volatile *a, int ## S v);
#endif
make_atomic_cas( 8)
make_atomic_cas(16)
make_atomic_cas(32)
make_atomic_cas(ptr)
make_atomic_add( 8)
make_atomic_add(16)
make_atomic_add(32)
make_atomic_load( 8)
make_atomic_load(16)
make_atomic_load(32)
make_atomic_load(ptr)
make_atomic_store( 8)
make_atomic_store(16)
make_atomic_store(32)
make_atomic_store(ptr)
make_atomic_swap( 8)
make_atomic_swap(16)
make_atomic_swap(32)
make_atomic_swap(ptr)
#undef make_atomic_add
#undef make_atomic_cas
#undef make_atomic_load
#undef make_atomic_store
#undef make_atomic_swap
#undef make_atomic_add_body
#undef make_atomic_cas_body
#undef make_atomic_load_body
#undef make_atomic_store_body
#undef make_atomic_swap_body
#undef intptr
#ifdef _atomic_h_cleanup_
#include _atomic_h_cleanup_
#undef _atomic_h_cleanup_
#endif
#define MY_ATOMIC_OK 0
#define MY_ATOMIC_NOT_1CPU 1
extern int my_atomic_initialize();
#endif
include/my_pthread.h
View file @ 46a3afb3
...@@ -715,7 +715,7 @@ extern uint thd_lib_detected; ...@@ -715,7 +715,7 @@ extern uint thd_lib_detected;
The implementation is guaranteed to be thread safe, on all platforms. The implementation is guaranteed to be thread safe, on all platforms.
Note that the calling code should *not* assume the counter is protected Note that the calling code should *not* assume the counter is protected
by the mutex given, as the implementation of these helpers may change by the mutex given, as the implementation of these helpers may change
to use my_atomic operations instead. to use atomic operations instead.
*/ */
/* /*
......
mysys/Makefile.am
View file @ 46a3afb3
...@@ -30,8 +30,7 @@ libmysys_a_SOURCES = my_init.c my_getwd.c mf_getdate.c my_mmap.c \ ...@@ -30,8 +30,7 @@ libmysys_a_SOURCES = my_init.c my_getwd.c mf_getdate.c my_mmap.c \
mf_tempdir.c my_lock.c mf_brkhant.c my_alarm.c \ mf_tempdir.c my_lock.c mf_brkhant.c my_alarm.c \
my_malloc.c my_realloc.c my_once.c mulalloc.c \ my_malloc.c my_realloc.c my_once.c mulalloc.c \
my_alloc.c safemalloc.c my_new.cc \ my_alloc.c safemalloc.c my_new.cc \
my_vle.c my_atomic.c \ my_vle.c my_fopen.c my_fstream.c my_getsystime.c \
my_fopen.c my_fstream.c my_getsystime.c \
my_error.c errors.c my_div.c my_messnc.c \ my_error.c errors.c my_div.c my_messnc.c \
mf_format.c mf_same.c mf_dirname.c mf_fn_ext.c \ mf_format.c mf_same.c mf_dirname.c mf_fn_ext.c \
my_symlink.c my_symlink2.c \ my_symlink.c my_symlink2.c \
......
mysys/my_atomic.c deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#include <my_pthread.h>
#ifndef HAVE_INLINE
/* the following will cause all inline functions to be instantiated */
#define HAVE_INLINE
#undef STATIC_INLINE
#define STATIC_INLINE extern
#endif
#include <my_atomic.h>
/*
checks that the current build of atomic ops
can run on this machine
RETURN
ATOMIC_xxx values, see my_atomic.h
*/
int my_atomic_initialize()
{
compile_time_assert(sizeof(intptr) == sizeof(void *));
/* currently the only thing worth checking is SMP/UP issue */
#ifdef MY_ATOMIC_MODE_DUMMY
return my_getncpus() == 1 ? MY_ATOMIC_OK : MY_ATOMIC_NOT_1CPU;
#else
return MY_ATOMIC_OK;
#endif
}
storage/ibmdb2i/db2i_file.h
View file @ 46a3afb3
...@@ -40,7 +40,6 @@ OF SUCH DAMAGE. ...@@ -40,7 +40,6 @@ OF SUCH DAMAGE.
#include "db2i_global.h" #include "db2i_global.h"
#include "db2i_ileBridge.h" #include "db2i_ileBridge.h"
#include "db2i_validatedPointer.h" #include "db2i_validatedPointer.h"
#include "my_atomic.h"
#include "db2i_iconv.h" #include "db2i_iconv.h"
#include "db2i_charsetSupport.h" #include "db2i_charsetSupport.h"
......
unittest/mysys/Makefile.am
View file @ 46a3afb3
...@@ -23,12 +23,5 @@ LDADD = $(top_builddir)/unittest/mytap/libmytap.a \ ...@@ -23,12 +23,5 @@ LDADD = $(top_builddir)/unittest/mytap/libmytap.a \
noinst_PROGRAMS = bitmap-t base64-t noinst_PROGRAMS = bitmap-t base64-t
if NEED_THREAD
# my_atomic-t is used to check thread functions, so it is safe to
# ignore the file in non-threaded builds.
# In fact, it will not compile without thread support.
noinst_PROGRAMS += my_atomic-t
endif
# Don't update the files from bitkeeper # Don't update the files from bitkeeper
%::SCCS/s.% %::SCCS/s.%
unittest/mysys/my_atomic-t.c deleted 100644 → 0
View file @ 5787f0f2
/* Copyright (C) 2006 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#include <my_sys.h>
#include <my_atomic.h>
#include <tap.h>
/* at least gcc 3.4.5 and 3.4.6 (but not 3.2.3) on RHEL */
#if __GNUC__ == 3 && __GNUC_MINOR__ == 4
#define GCC_BUG_WORKAROUND volatile
#else
#define GCC_BUG_WORKAROUND
#endif
int32 a32,b32,c32;
my_atomic_rwlock_t rwl;
pthread_attr_t thr_attr;
pthread_mutex_t mutex;
pthread_cond_t cond;
int N;
/* add and sub a random number in a loop. Must get 0 at the end */
pthread_handler_t test_atomic_add_handler(void *arg)
{
int m=*(int *)arg;
GCC_BUG_WORKAROUND int32 x;
for (x=((int)((long)(&m))); m ; m--)
{
x=x*m+0x87654321;
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&a32, x);
my_atomic_rwlock_wrunlock(&rwl);
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&a32, -x);
my_atomic_rwlock_wrunlock(&rwl);
}
pthread_mutex_lock(&mutex);
N--;
if (!N) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
/*
1. generate thread number 0..N-1 from b32
2. add it to a32
3. swap thread numbers in c32
4. (optionally) one more swap to avoid 0 as a result
5. subtract result from a32
must get 0 in a32 at the end
*/
pthread_handler_t test_atomic_swap_handler(void *arg)
{
int m=*(int *)arg;
int32 x;
my_atomic_rwlock_wrlock(&rwl);
x=my_atomic_add32(&b32, 1);
my_atomic_rwlock_wrunlock(&rwl);
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&a32, x);
my_atomic_rwlock_wrunlock(&rwl);
for (; m ; m--)
{
my_atomic_rwlock_wrlock(&rwl);
x=my_atomic_swap32(&c32, x);
my_atomic_rwlock_wrunlock(&rwl);
}
if (!x)
{
my_atomic_rwlock_wrlock(&rwl);
x=my_atomic_swap32(&c32, x);
my_atomic_rwlock_wrunlock(&rwl);
}
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&a32, -x);
my_atomic_rwlock_wrunlock(&rwl);
pthread_mutex_lock(&mutex);
N--;
if (!N) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
/*
same as test_atomic_add_handler, but my_atomic_add32 is emulated with
(slower) my_atomic_cas32
*/
pthread_handler_t test_atomic_cas_handler(void *arg)
{
int m=*(int *)arg, ok;
GCC_BUG_WORKAROUND int32 x,y;
for (x=((int)((long)(&m))); m ; m--)
{
my_atomic_rwlock_wrlock(&rwl);
y=my_atomic_load32(&a32);
my_atomic_rwlock_wrunlock(&rwl);
x=x*m+0x87654321;
do {
my_atomic_rwlock_wrlock(&rwl);
ok=my_atomic_cas32(&a32, &y, y+x);
my_atomic_rwlock_wrunlock(&rwl);
} while (!ok);
do {
my_atomic_rwlock_wrlock(&rwl);
ok=my_atomic_cas32(&a32, &y, y-x);
my_atomic_rwlock_wrunlock(&rwl);
} while (!ok);
}
pthread_mutex_lock(&mutex);
N--;
if (!N) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
void test_atomic(const char *test, pthread_handler handler, int n, int m)
{
pthread_t t;
ulonglong now=my_getsystime();
a32= 0;
b32= 0;
c32= 0;
diag("Testing %s with %d threads, %d iterations... ", test, n, m);
for (N=n ; n ; n--)
{
if (pthread_create(&t, &thr_attr, handler, &m) != 0)
{
diag("Could not create thread");
a32= 1;
goto err;
}
}
pthread_mutex_lock(&mutex);
while (N)
pthread_cond_wait(&cond, &mutex);
pthread_mutex_unlock(&mutex);
now=my_getsystime()-now;
err:
ok(a32 == 0, "tested %s in %g secs", test, ((double)now)/1e7);
}
int main()
{
int err;
MY_INIT("my_atomic-t.c");
diag("N CPUs: %d", my_getncpus());
err= my_atomic_initialize();
plan(4);
ok(err == 0, "my_atomic_initialize() returned %d", err);
pthread_attr_init(&thr_attr);
pthread_attr_setdetachstate(&thr_attr,PTHREAD_CREATE_DETACHED);
pthread_mutex_init(&mutex, 0);
pthread_cond_init(&cond, 0);
my_atomic_rwlock_init(&rwl);
#ifdef HPUX11
#define CYCLES 1000
#else
#define CYCLES 10000
#endif
#define THREADS 100
test_atomic("my_atomic_add32", test_atomic_add_handler, THREADS, CYCLES);
test_atomic("my_atomic_swap32", test_atomic_swap_handler, THREADS, CYCLES);
test_atomic("my_atomic_cas32", test_atomic_cas_handler, THREADS, CYCLES);
/*
workaround until we know why it crashes randomly on some machine
(BUG#22320).
*/
sleep(2);
pthread_mutex_destroy(&mutex);
pthread_cond_destroy(&cond);
pthread_attr_destroy(&thr_attr);
my_atomic_rwlock_destroy(&rwl);
return exit_status();
}
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