my_pthread.h

SDL文件。SDL_ERROwenjian.....

/* Copyright (C) 2000 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 */

/* Defines to make different thread packages compatible */

#ifndef _my_pthread_h
#define _my_pthread_h

#ifndef ETIME
#define ETIME ETIMEDOUT				/* For FreeBSD */
#endif

#ifdef  __cplusplus
#define EXTERNC extern "C"
extern "C" {
#else
#define EXTERNC
#endif /* __cplusplus */ 

/*
  BUG#24507: Race conditions inside current NPTL pthread_exit() implementation.
  
  If macro NPTL_PTHREAD_EXIT_HACK is defined then a hack described in the bug
  report will be implemented inside my_thread_global_init() in my_thr_init.c.
   
  This amounts to spawning a dummy thread which does nothing but executes 
  pthread_exit(0). 
  
  This bug is fixed in version 2.5 of glibc library.
  
  TODO: Remove this code when fixed versions of glibc6 are in common use. 
 */

#if defined(TARGET_OS_LINUX) && defined(HAVE_NPTL) && \
    defined(__GLIBC__) && ( __GLIBC__ < 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ < 5 )
#define NPTL_PTHREAD_EXIT_BUG	1
#endif 

#if defined(__WIN__)
typedef CRITICAL_SECTION pthread_mutex_t;
typedef HANDLE		 pthread_t;
typedef struct thread_attr {
    DWORD dwStackSize ;
    DWORD dwCreatingFlag ;
    int priority ;
} pthread_attr_t ;

typedef struct { int dummy; } pthread_condattr_t;

/* Implementation of posix conditions */

typedef struct st_pthread_link {
  DWORD thread_id;
  struct st_pthread_link *next;
} pthread_link;

typedef struct {
  uint32 waiting;
  CRITICAL_SECTION lock_waiting;
 
  enum {
    SIGNAL= 0,
    BROADCAST= 1,
    MAX_EVENTS= 2
  } EVENTS;

  HANDLE events[MAX_EVENTS];
  HANDLE broadcast_block_event;

} pthread_cond_t;


typedef int pthread_mutexattr_t;
#define win_pthread_self my_thread_var->pthread_self
#define pthread_self() win_pthread_self
#define pthread_handler_t EXTERNC void * __cdecl
typedef void * (__cdecl *pthread_handler)(void *);

/*
  Struct and macros to be used in combination with the
  windows implementation of pthread_cond_timedwait
*/

/*
   Declare a union to make sure FILETIME is properly aligned
   so it can be used directly as a 64 bit value. The value
   stored is in 100ns units.
 */
 union ft64 {
  FILETIME ft;
  __int64 i64;
 };
struct timespec {
  union ft64 tv;
  /* The max timeout value in millisecond for pthread_cond_timedwait */
  long max_timeout_msec;
};
#define set_timespec(ABSTIME,SEC) { \
  GetSystemTimeAsFileTime(&((ABSTIME).tv.ft)); \
  (ABSTIME).tv.i64+= (__int64)(SEC)*10000000; \
  (ABSTIME).max_timeout_msec= (long)((SEC)*1000); \
}
#define set_timespec_nsec(ABSTIME,NSEC) { \
  GetSystemTimeAsFileTime(&((ABSTIME).tv.ft)); \
  (ABSTIME).tv.i64+= (__int64)(NSEC)/100; \
  (ABSTIME).max_timeout_msec= (long)((NSEC)/1000000); \
}

void win_pthread_init(void);
int win_pthread_setspecific(void *A,void *B,uint length);
int pthread_create(pthread_t *,pthread_attr_t *,pthread_handler,void *);
int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr);
int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
			   struct timespec *abstime);
int pthread_cond_signal(pthread_cond_t *cond);
int pthread_cond_broadcast(pthread_cond_t *cond);
int pthread_cond_destroy(pthread_cond_t *cond);
int pthread_attr_init(pthread_attr_t *connect_att);
int pthread_attr_setstacksize(pthread_attr_t *connect_att,DWORD stack);
int pthread_attr_setprio(pthread_attr_t *connect_att,int priority);
int pthread_attr_destroy(pthread_attr_t *connect_att);
struct tm *localtime_r(const time_t *timep,struct tm *tmp);
struct tm *gmtime_r(const time_t *timep,struct tm *tmp);


void pthread_exit(void *a);	 /* was #define pthread_exit(A) ExitThread(A)*/

#define ETIMEDOUT 145		    /* Win32 doesn't have this */
#define getpid() GetCurrentThreadId()
#define HAVE_LOCALTIME_R		1
#define _REENTRANT			1
#define HAVE_PTHREAD_ATTR_SETSTACKSIZE	1

/*
  Windows has two ways to use thread local storage. The most efficient
  is using __declspec(thread), but that does not work properly when
  used in a .dll that is loaded at runtime, after program load. So for
  libmysql.dll and libmysqld.dll we define USE_TLS in order to use the
  TlsXxx() API instead, which works in all cases.
*/
#ifdef USE_TLS					/* For LIBMYSQL.DLL */
#undef SAFE_MUTEX				/* This will cause conflicts */
#define pthread_key(T,V)  DWORD V
#define pthread_key_create(A,B) ((*A=TlsAlloc())==0xFFFFFFFF)
#define pthread_key_delete(A) TlsFree(A)
#define pthread_getspecific(A) (TlsGetValue(A))
#define my_pthread_getspecific(T,A) ((T) TlsGetValue(A))
#define my_pthread_getspecific_ptr(T,V) ((T) TlsGetValue(V))
#define my_pthread_setspecific_ptr(T,V) (!TlsSetValue((T),(V)))
#define pthread_setspecific(A,B) (!TlsSetValue((A),(B)))
#else
#define pthread_key(T,V) __declspec(thread) T V
#define pthread_key_create(A,B) pthread_dummy(0)
#define pthread_key_delete(A) pthread_dummy(0)
#define pthread_getspecific(A) (&(A))
#define my_pthread_getspecific(T,A) (&(A))
#define my_pthread_getspecific_ptr(T,V) (V)
#define my_pthread_setspecific_ptr(T,V) ((T)=(V),0)
#define pthread_setspecific(A,B) win_pthread_setspecific(&(A),(B),sizeof(A))
#endif /* USE_TLS */

#define pthread_equal(A,B) ((A) == (B))
#define pthread_mutex_init(A,B)  (InitializeCriticalSection(A),0)
#define pthread_mutex_lock(A)	 (EnterCriticalSection(A),0)
#define pthread_mutex_trylock(A) (WaitForSingleObject((A), 0) == WAIT_TIMEOUT)
#define pthread_mutex_unlock(A)  LeaveCriticalSection(A)
#define pthread_mutex_destroy(A) DeleteCriticalSection(A)
#define my_pthread_setprio(A,B)  SetThreadPriority(GetCurrentThread(), (B))
#define pthread_kill(A,B) pthread_dummy(0)

#define pthread_join(A,B) (WaitForSingleObject((A), INFINITE) != WAIT_OBJECT_0)

/* Dummy defines for easier code */
#define pthread_attr_setdetachstate(A,B) pthread_dummy(0)
#define my_pthread_attr_setprio(A,B) pthread_attr_setprio(A,B)
#define pthread_attr_setscope(A,B)
#define pthread_detach_this_thread()
#define pthread_condattr_init(A)
#define pthread_condattr_destroy(A)

#define my_pthread_getprio(thread_id) pthread_dummy(0)

#else /* Normal threads */

#ifdef HAVE_rts_threads
#define sigwait org_sigwait
#include <signal.h>
#undef sigwait
#endif
#include <pthread.h>
#ifndef _REENTRANT
#define _REENTRANT
#endif
#ifdef HAVE_THR_SETCONCURRENCY
#include <thread.h>			/* Probably solaris */
#endif
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
#ifdef HAVE_SYNCH_H
#include <synch.h>
#endif

#ifdef __NETWARE__
void my_pthread_exit(void *status);
#define pthread_exit(A) my_pthread_exit(A)
#endif

extern int my_pthread_getprio(pthread_t thread_id);

#define pthread_key(T,V) pthread_key_t V
#define my_pthread_getspecific_ptr(T,V) my_pthread_getspecific(T,(V))
#define my_pthread_setspecific_ptr(T,V) pthread_setspecific(T,(void*) (V))
#define pthread_detach_this_thread()
#define pthread_handler_t EXTERNC void *
typedef void *(* pthread_handler)(void *);

/* Test first for RTS or FSU threads */

#if defined(PTHREAD_SCOPE_GLOBAL) && !defined(PTHREAD_SCOPE_SYSTEM)
#define HAVE_rts_threads
extern int my_pthread_create_detached;
#define pthread_sigmask(A,B,C) sigprocmask((A),(B),(C))
#define PTHREAD_CREATE_DETACHED &my_pthread_create_detached
#define PTHREAD_SCOPE_SYSTEM  PTHREAD_SCOPE_GLOBAL
#define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_LOCAL
#define USE_ALARM_THREAD
#endif /* defined(PTHREAD_SCOPE_GLOBAL) && !defined(PTHREAD_SCOPE_SYSTEM) */

#if defined(_BSDI_VERSION) && _BSDI_VERSION < 199910
int sigwait(sigset_t *set, int *sig);
#endif

#ifndef HAVE_NONPOSIX_SIGWAIT
#define my_sigwait(A,B) sigwait((A),(B))
#else
int my_sigwait(const sigset_t *set,int *sig);
#endif

#ifdef HAVE_NONPOSIX_PTHREAD_MUTEX_INIT
#ifndef SAFE_MUTEX
#define pthread_mutex_init(a,b) my_pthread_mutex_init((a),(b))
extern int my_pthread_mutex_init(pthread_mutex_t *mp,
				 const pthread_mutexattr_t *attr);
#endif /* SAFE_MUTEX */
#define pthread_cond_init(a,b) my_pthread_cond_init((a),(b))
extern int my_pthread_cond_init(pthread_cond_t *mp,
				const pthread_condattr_t *attr);
#endif /* HAVE_NONPOSIX_PTHREAD_MUTEX_INIT */

#if defined(HAVE_SIGTHREADMASK) && !defined(HAVE_PTHREAD_SIGMASK)
#define pthread_sigmask(A,B,C) sigthreadmask((A),(B),(C))
#endif

#if !defined(HAVE_SIGWAIT) && !defined(HAVE_rts_threads) && !defined(sigwait) && !defined(alpha_linux_port) && !defined(HAVE_NONPOSIX_SIGWAIT) && !defined(HAVE_DEC_3_2_THREADS) && !defined(_AIX)
int sigwait(sigset_t *setp, int *sigp);		/* Use our implemention */
#endif


/*
  We define my_sigset() and use that instead of the system sigset() so that
  we can favor an implementation based on sigaction(). On some systems, such
  as Mac OS X, sigset() results in flags such as SA_RESTART being set, and
  we want to make sure that no such flags are set.
*/
#if defined(HAVE_SIGACTION) && !defined(my_sigset)
#define my_sigset(A,B) do { struct sigaction l_s; sigset_t l_set; int l_rc; \
                            DBUG_ASSERT((A) != 0);                          \
                            sigemptyset(&l_set);                            \
                            l_s.sa_handler = (B);                           \
                            l_s.sa_mask   = l_set;                          \
                            l_s.sa_flags   = 0;                             \
                            l_rc= sigaction((A), &l_s, (struct sigaction *) NULL);\
                            DBUG_ASSERT(l_rc == 0);                         \
                          } while (0)
#elif defined(HAVE_SIGSET) && !defined(my_sigset)
#define my_sigset(A,B) sigset((A),(B))
#elif !defined(my_sigset)
#define my_sigset(A,B) signal((A),(B))
#endif

#ifndef my_pthread_setprio
#if defined(HAVE_PTHREAD_SETPRIO_NP)		/* FSU threads */
#define my_pthread_setprio(A,B) pthread_setprio_np((A),(B))
#elif defined(HAVE_PTHREAD_SETPRIO)
#define my_pthread_setprio(A,B) pthread_setprio((A),(B))
#else
extern void my_pthread_setprio(pthread_t thread_id,int prior);
#endif
#endif

#ifndef my_pthread_attr_setprio
#ifdef HAVE_PTHREAD_ATTR_SETPRIO
#define my_pthread_attr_setprio(A,B) pthread_attr_setprio((A),(B))
#else
extern void my_pthread_attr_setprio(pthread_attr_t *attr, int priority);
#endif
#endif

#if !defined(HAVE_PTHREAD_ATTR_SETSCOPE) || defined(HAVE_DEC_3_2_THREADS)
#define pthread_attr_setscope(A,B)
#undef	HAVE_GETHOSTBYADDR_R			/* No definition */
#endif

#if defined(HAVE_BROKEN_PTHREAD_COND_TIMEDWAIT) && !defined(SAFE_MUTEX)
extern int my_pthread_cond_timedwait(pthread_cond_t *cond,
				     pthread_mutex_t *mutex,
				     struct timespec *abstime);
#define pthread_cond_timedwait(A,B,C) my_pthread_cond_timedwait((A),(B),(C))
#endif

#if !defined( HAVE_NONPOSIX_PTHREAD_GETSPECIFIC)
#define my_pthread_getspecific(A,B) ((A) pthread_getspecific(B))
#else
#define my_pthread_getspecific(A,B) ((A) my_pthread_getspecific_imp(B))
void *my_pthread_getspecific_imp(pthread_key_t key);
#endif

#ifndef HAVE_LOCALTIME_R
struct tm *localtime_r(const time_t *clock, struct tm *res);
#endif

#ifndef HAVE_GMTIME_R
struct tm *gmtime_r(const time_t *clock, struct tm *res);
#endif

#ifdef HAVE_PTHREAD_CONDATTR_CREATE
/* DCE threads on HPUX 10.20 */
#define pthread_condattr_init pthread_condattr_create
#define pthread_condattr_destroy pthread_condattr_delete
#endif

/* FSU THREADS */
#if !defined(HAVE_PTHREAD_KEY_DELETE) && !defined(pthread_key_delete)
#define pthread_key_delete(A) pthread_dummy(0)
#endif

#ifdef HAVE_CTHREADS_WRAPPER			/* For MacOSX */
#define pthread_cond_destroy(A) pthread_dummy(0)
#define pthread_mutex_destroy(A) pthread_dummy(0)
#define pthread_attr_delete(A) pthread_dummy(0)
#define pthread_condattr_delete(A) pthread_dummy(0)
#define pthread_attr_setstacksize(A,B) pthread_dummy(0)
#define pthread_equal(A,B) ((A) == (B))
#define pthread_cond_timedwait(a,b,c) pthread_cond_wait((a),(b))
#define pthread_attr_init(A) pthread_attr_create(A)
#define pthread_attr_destroy(A) pthread_attr_delete(A)
#define pthread_attr_setdetachstate(A,B) pthread_dummy(0)
#define pthread_create(A,B,C,D) pthread_create((A),*(B),(C),(D))
#define pthread_sigmask(A,B,C) sigprocmask((A),(B),(C))
#define pthread_kill(A,B) pthread_dummy(0)
#undef	pthread_detach_this_thread
#define pthread_detach_this_thread() { pthread_t tmp=pthread_self() ; pthread_detach(&tmp); }
#endif

#ifdef HAVE_DARWIN5_THREADS
#define pthread_sigmask(A,B,C) sigprocmask((A),(B),(C))
#define pthread_kill(A,B) pthread_dummy(0)
#define pthread_condattr_init(A) pthread_dummy(0)
#define pthread_condattr_destroy(A) pthread_dummy(0)
#undef	pthread_detach_this_thread
#define pthread_detach_this_thread() { pthread_t tmp=pthread_self() ; pthread_detach(tmp); }
#endif

#if ((defined(HAVE_PTHREAD_ATTR_CREATE) && !defined(HAVE_SIGWAIT)) || defined(HAVE_DEC_3_2_THREADS)) && !defined(HAVE_CTHREADS_WRAPPER)
/* This is set on AIX_3_2 and Siemens unix (and DEC OSF/1 3.2 too) */
#define pthread_key_create(A,B) \
		pthread_keycreate(A,(B) ?\
				  (pthread_destructor_t) (B) :\
				  (pthread_destructor_t) pthread_dummy)
#define pthread_attr_init(A) pthread_attr_create(A)
#define pthread_attr_destroy(A) pthread_attr_delete(A)
#define pthread_attr_setdetachstate(A,B) pthread_dummy(0)
#define pthread_create(A,B,C,D) pthread_create((A),*(B),(C),(D))
#ifndef pthread_sigmask
#define pthread_sigmask(A,B,C) sigprocmask((A),(B),(C))
#endif