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/*
* implement.h
*
* Definitions that don't need to be public.
*
* Keeps all the internals out of pthread.h
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright (C) 1998
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA
*/
#ifndef _IMPLEMENT_H
#define _IMPLEMENT_H
#ifdef __MINGW32__
#define PT_STDCALL
#else
#ifdef __cplusplus
#define PT_STDCALL __stdcall
#else
#define PT_STDCALL __stdcall
#endif
#endif
/* changed include from <semaphore.h> to use local file during development */
#include "semaphore.h"
typedef enum {
/*
* This enumeration represents the state of the thread;
* The thread is still "alive" if the numeric value of the
* state is greater or equal "PThreadStateRunning".
*/
PThreadStateInitial = 0, /* Thread not running */
PThreadStateRunning, /* Thread alive & kicking */
PThreadStateSuspended, /* Thread alive but suspended */
PThreadStateCanceling, /* Thread alive but and is */
/* in the process of terminating */
/* due to a cancellation request */
PThreadStateException, /* Thread alive but exiting */
/* due to an exception */
PThreadStateLast
}
PThreadState;
typedef enum {
/*
* This enumeration represents the reason why a thread has
* terminated/is terminating.
*/
PThreadDemisePeaceful = 0, /* Death due natural causes */
PThreadDemiseCancelled, /* Death due to user cancel */
PThreadDemiseException, /* Death due to unhandled */
/* exception */
PThreadDemiseNotDead /* I'm not dead! */
}
PThreadDemise;
struct pthread_t_ {
DWORD thread;
HANDLE threadH;
PThreadState state;
PThreadDemise demise;
void * exitStatus;
void * parms;
int ptErrno;
int detachState;
CriticalSection cancelLock; /* Used for async-cancel safety */
int cancelState;
int cancelType;
HANDLE cancelEvent;
#if HAVE_SIGSET_T
sigset_t sigmask;
#endif /* HAVE_SIGSET_T */
int implicit:1;
void * keys;
};
/*
* Special value to mark attribute objects as valid.
*/
#define PTW32_ATTR_VALID ((unsigned long) 0xC4C0FFEE)
struct pthread_attr_t_ {
unsigned long valid;
void * stackaddr;
size_t stacksize;
int detachstate;
int priority;
#if HAVE_SIGSET_T
sigset_t sigmask;
#endif /* HAVE_SIGSET_T */
};
/*
* ====================
* ====================
* Mutexes and Condition Variables
* ====================
* ====================
*/
/*
* The following macros are used to serialise access to an object,
* including possibly before it is initialised.
* See mutex.c:pthread_mutex_lock() for an example.
*/
#define PTW32_OBJECT_GET(type, pObject, Dest) \
while (((Dest) = (type) InterlockedExchange((LPLONG)(pObject), \
(LONG)PTW32_OBJECT_IN_USE)) \
== (type)PTW32_OBJECT_IN_USE) \
{ \
Sleep(0); \
}
#define PTW32_OBJECT_SET(pObject, value) \
(void) InterlockedExchange((LPLONG)(pObject), (LONG)(value))
#define PTW32_OBJECT_TRYGET(type, pObject, Dest) \
((((Dest) = (type) InterlockedExchange((LPLONG)(pObject), \
(LONG)PTW32_OBJECT_IN_USE)) \
== (type)PTW32_OBJECT_IN_USE) ? ((void) InterlockedExchange((LPLONG)(pObject), \
(LONG)(Dest)) , 0) \
: 1)
#define PTW32_OBJECT_IN_USE ((void *) -2)
#define PTW32_OBJECT_AUTO_INIT ((void *) -1)
#define PTW32_OBJECT_INVALID NULL
struct pthread_mutexattr_t_ {
int pshared;
int type;
};
struct pthread_mutex_t_ {
long lock_idx;
long try_lock;
int pshared;
int type;
pthread_t owner;
long waiters; /* These last elements ensure fairness */
pthread_t lastOwner; /* and guard against canceled threads. */
pthread_t lastWaiter;
};
struct pthread_key_t_ {
DWORD key;
void (*destructor) (void *);
pthread_mutex_t threadsLock;
void * threads;
};
typedef struct ThreadParms ThreadParms;
typedef struct ThreadKeyAssoc ThreadKeyAssoc;
struct ThreadParms {
pthread_t tid;
void *(*start) (void *);
void * arg;
};
struct pthread_cond_t_ {
long nWaitersBlocked; /* Number of threads blocked */
long nWaitersUnblocked; /* Number of threads unblocked */
long nWaitersToUnblock; /* Number of threads to unblock */
sem_t semBlockQueue; /* Queue up threads waiting for the */
/* condition to become signalled */
sem_t semBlockLock; /* Semaphore that guards access to */
/* | waiters blocked count/block queue */
/* +-> Mandatory Sync.LEVEL-1 */
pthread_mutex_t mtxUnblockLock; /* Mutex that guards access to */
/* | waiters (to)unblock(ed) counts */
/* +-> Optional* Sync.LEVEL-2 */
}; /* Opt*) for _timedwait and cancellation*/
struct pthread_condattr_t_ {
int pshared;
};
#define PTW32_RWLOCK_MAGIC 0xfacade2
struct pthread_rwlock_t_ {
pthread_mutex_t mtxExclusiveAccess;
pthread_mutex_t mtxSharedAccessCompleted;
pthread_cond_t cndSharedAccessCompleted;
int nSharedAccessCount;
int nExclusiveAccessCount;
int nCompletedSharedAccessCount;
int nMagic;
};
struct pthread_rwlockattr_t_ {
int pshared;
};
struct ThreadKeyAssoc {
/*
* Purpose:
* This structure creates an association between a
* thread and a key.
* It is used to implement the implicit invocation
* of a user defined destroy routine for thread
* specific data registered by a user upon exiting a
* thread.
*
* Attributes:
* lock
* protects access to the rest of the structure
*
* thread
* reference to the thread that owns the association.
* As long as this is not NULL, the association remains
* referenced by the pthread_t.
*
* key
* reference to the key that owns the association.
* As long as this is not NULL, the association remains
* referenced by the pthread_key_t.
*
* nextKey
* The pthread_t->keys attribute is the head of a
* chain of associations that runs through the nextKey
* link. This chain provides the 1 to many relationship
* between a pthread_t and all pthread_key_t on which
* it called pthread_setspecific.
*
* nextThread
* The pthread_key_t->threads attribute is the head of
* a chain of assoctiations that runs through the
* nextThreads link. This chain provides the 1 to many
* relationship between a pthread_key_t and all the
* PThreads that have called pthread_setspecific for
* this pthread_key_t.
*
*
* Notes:
* 1) As long as one of the attributes, thread or key, is
* not NULL, the association is being referenced; once
* both are NULL, the association must be released.
*
* 2) Under WIN32, an association is only created by
* pthread_setspecific if the user provided a
* destroyRoutine when they created the key.
*
*
*/
pthread_mutex_t lock;
pthread_t thread;
pthread_key_t key;
ThreadKeyAssoc * nextKey;
ThreadKeyAssoc * nextThread;
};
#if defined(_MSC_VER) && !defined(__cplusplus)
/*
* --------------------------------------------------------------
* MAKE_SOFTWARE_EXCEPTION
* This macro constructs a software exception code following
* the same format as the standard Win32 error codes as defined
* in WINERROR.H
* Values are 32 bit values layed out as follows:
*
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +---+-+-+-----------------------+-------------------------------+
* |Sev|C|R| Facility | Code |
* +---+-+-+-----------------------+-------------------------------+
*
* Severity Values:
*/
#define SE_SUCCESS 0x00
#define SE_INFORMATION 0x01
#define SE_WARNING 0x02
#define SE_ERROR 0x03
#define MAKE_SOFTWARE_EXCEPTION( _severity, _facility, _exception ) \
( (DWORD) ( ( (_severity) << 30 ) | /* Severity code */ \
( 1 << 29 ) | /* MS=0, User=1 */ \
( 0 << 28 ) | /* Reserved */ \
( (_facility) << 16 ) | /* Facility Code */ \
( (_exception) << 0 ) /* Exception Code */ \
) )
/*
* We choose one specific Facility/Error code combination to
* identify our software exceptions vs. WIN32 exceptions.
* We store our actual component and error code within
* the optional information array.
*/
#define EXCEPTION_PTW32_SERVICES \
MAKE_SOFTWARE_EXCEPTION( SE_ERROR, \
PTW32_SERVICES_FACILITY, \
PTW32_SERVICES_ERROR )
#define PTW32_SERVICES_FACILITY 0xBAD
#define PTW32_SERVICES_ERROR 0xDEED
#endif /* _MSC_VER */
/*
* Services available through EXCEPTION_PTW32_SERVICES
* and also used [as parameters to ptw32_throw()] as
* generic exception selectors.
*/
#define PTW32_EPS_CANCEL 0
#define PTW32_EPS_EXIT 1
/* Declared in global.c */
extern int ptw32_processInitialized;
extern pthread_key_t ptw32_selfThreadKey;
extern pthread_key_t ptw32_cleanupKey;
extern CRITICAL_SECTION ptw32_mutex_test_init_lock;
extern CRITICAL_SECTION ptw32_cond_test_init_lock;
extern CRITICAL_SECTION ptw32_rwlock_test_init_lock;
extern BOOL (WINAPI *ptw32_try_enter_critical_section)(LPCRITICAL_SECTION);
extern int ptw32_mutex_mapped_default;
/* Declared in misc.c */
#ifdef NEED_CALLOC
#define calloc(n, s) ptw32_calloc(n, s)
void *ptw32_calloc(size_t n, size_t s);
#endif
/* Declared in private.c */
void ptw32_throw(DWORD exception);
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/*
* =====================
* =====================
* Forward Declarations
* =====================
* =====================
*/
int ptw32_processInitialize (void);
void ptw32_processTerminate (void);
void ptw32_threadDestroy (pthread_t tid);
void ptw32_cleanupStack (void);
pthread_t ptw32_new (void);
#if ! defined (__MINGW32__) || defined (__MSVCRT__)
unsigned PT_STDCALL
#else
void
#endif
ptw32_threadStart (ThreadParms * threadParms);
void ptw32_callUserDestroyRoutines (pthread_t thread);
int ptw32_tkAssocCreate (ThreadKeyAssoc ** assocP,
pthread_t thread,
pthread_key_t key);
void ptw32_tkAssocDestroy (ThreadKeyAssoc * assoc);
int ptw32_sem_timedwait (sem_t * sem,
const struct timespec * abstime);
#ifdef NEED_SEM
void ptw32_decrease_semaphore(sem_t * sem);
BOOL ptw32_increase_semaphore(sem_t * sem,
unsigned int n);
#endif /* NEED_SEM */
#ifdef __cplusplus
}
#endif /* __cplusplus */
/*
* Check for old and new versions of cygwin. See the FAQ file:
*
* Question 1 - How do I get pthreads-win32 to link under Cygwin or Mingw32?
*
* Patch by Anders Norlander <anorland@hem2.passagen.se>
*/
#if defined(__CYGWIN32__) || defined(__CYGWIN__) || defined(NEED_CREATETHREAD)
/*
* Macro uses args so we can cast start_proc to LPTHREAD_START_ROUTINE
* in order to avoid warnings because of return type
*/
#define _beginthreadex(security, \
stack_size, \
start_proc, \
arg, \
flags, \
pid) \
CreateThread(security, \
stack_size, \
(LPTHREAD_START_ROUTINE) start_proc, \
arg, \
flags, \
pid)
#define _endthreadex ExitThread
#endif /* __CYGWIN32__ || __CYGWIN__ || NEED_CREATETHREAD*/
#endif /* _IMPLEMENT_H */