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Viewing file:     my_pthread.h (30.46 KB)      -rw-rw-rw-

/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */

/* Defines to make different thread packages compatible */

#ifndef _my_pthread_h
#define _my_pthread_h

#include "my_global.h"                          /* myf */

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

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

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

/**
  Implementation of Windows condition variables.
  We use native conditions on Vista and later, and fallback to own 
  implementation on earlier OS version.
*/
typedef union
{
  /* Native condition (used on Vista and later) */
  CONDITION_VARIABLE native_cond;

  /* Own implementation (used on XP) */
  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 pthread_self() GetCurrentThreadId()
#define pthread_handler_t EXTERNC void * __cdecl
typedef void * (__cdecl *pthread_handler)(void *);

typedef volatile LONG my_pthread_once_t;
#define MY_PTHREAD_ONCE_INIT  0
#define MY_PTHREAD_ONCE_INPROGRESS 1
#define MY_PTHREAD_ONCE_DONE 2

/*
  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_time_nsec(ABSTIME,TIME,NSEC) do {          \
  (ABSTIME).tv.i64= (TIME)+(__int64)(NSEC)/100;                 \
  (ABSTIME).max_timeout_msec= (long)((NSEC)/1000000);           \
} while(0)

#define set_timespec_nsec(ABSTIME,NSEC) do {                    \
  union ft64 tv;                                                \
  GetSystemTimeAsFileTime(&tv.ft);                              \
  set_timespec_time_nsec((ABSTIME), tv.i64, (NSEC));            \
} while(0)

/**
   Compare two timespec structs.

   @retval  1 If TS1 ends after TS2.

   @retval  0 If TS1 is equal to TS2.

   @retval -1 If TS1 ends before TS2.
*/
#define cmp_timespec(TS1, TS2) \
  ((TS1.tv.i64 > TS2.tv.i64) ? 1 : \
   ((TS1.tv.i64 < TS2.tv.i64) ? -1 : 0))

#define diff_timespec(TS1, TS2) \
  ((TS1.tv.i64 - TS2.tv.i64) * 100)

int win_pthread_mutex_trylock(pthread_mutex_t *mutex);
int pthread_create(pthread_t *, const 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,
			   const 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_destroy(pthread_attr_t *connect_att);
int my_pthread_once(my_pthread_once_t *once_control,void (*init_routine)(void));
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);
int pthread_join(pthread_t thread, void **value_ptr);
int pthread_cancel(pthread_t thread);

#ifndef ETIMEDOUT
#define ETIMEDOUT 145		    /* Win32 doesn't have this */
#endif
#define HAVE_LOCALTIME_R		1
#define _REENTRANT			1
#define HAVE_PTHREAD_ATTR_SETSTACKSIZE	1


#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 my_pthread_setspecific_ptr(T,V) (!TlsSetValue((T),(V)))
#define pthread_setspecific(A,B) (!TlsSetValue((A),(B)))
#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 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) win_pthread_mutex_trylock((A))
#define pthread_mutex_unlock(A)  (LeaveCriticalSection(A), 0)
#define pthread_mutex_destroy(A) (DeleteCriticalSection(A), 0)
#define pthread_kill(A,B) pthread_dummy((A) ? 0 : ESRCH)


/* Dummy defines for easier code */
#define pthread_attr_setdetachstate(A,B) pthread_dummy(0)
#define pthread_attr_setscope(A,B)
#define pthread_detach_this_thread()
#define pthread_condattr_init(A)
#define pthread_condattr_destroy(A)
#define pthread_yield() SwitchToThread()
#define my_sigset(A,B) signal(A,B)

#else /* Normal threads */

#ifdef HAVE_rts_threads
#define sigwait org_sigwait
#include 
#undef sigwait
#endif
#include 
#ifndef _REENTRANT
#define _REENTRANT
#endif
#ifdef HAVE_THR_SETCONCURRENCY
#include 			/* Probably solaris */
#endif
#ifdef HAVE_SCHED_H
#include 
#endif
#ifdef HAVE_SYNCH_H
#include 
#endif

#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 *);

#define my_pthread_once_t pthread_once_t
#if defined(PTHREAD_ONCE_INITIALIZER)
#define MY_PTHREAD_ONCE_INIT PTHREAD_ONCE_INITIALIZER
#else
#define MY_PTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
#endif
#define my_pthread_once(C,F) pthread_once(C,F)

/* 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;           \
                            DBUG_ASSERT((A) != 0);                          \
                            sigemptyset(&l_set);                            \
                            l_s.sa_handler = (B);                           \
                            l_s.sa_mask   = l_set;                          \
                            l_s.sa_flags   = 0;                             \
                            sigaction((A), &l_s, NULL);                     \
                          } 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

#if !defined(HAVE_PTHREAD_ATTR_SETSCOPE) 
bool(false)