/* * 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 #include 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; 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 _PTHREAD_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 * ==================== * ==================== */ #define _PTHREAD_OBJECT_AUTO_INIT ((void *) -1) #define _PTHREAD_OBJECT_INVALID NULL struct pthread_mutex_t_ { HANDLE mutex; CRITICAL_SECTION cs; }; struct pthread_mutexattr_t_ { int pshared; int forcecs; }; 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 waiters; /* # waiting threads */ pthread_mutex_t waitersLock; /* Mutex that guards access to waiter count */ sem_t sema; /* Queue up threads waiting for the condition to become signaled */ HANDLE waitersDone; /* An auto reset event used by the broadcast/signal thread to wait for the waiting thread(s) to wake up and get a chance at the semaphore */ int wasBroadcast; /* keeps track if we are signaling or broadcasting */ }; struct pthread_condattr_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; }; #ifdef _MSC_VER /* * -------------------------------------------------------------- * 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_PTHREAD_SERVICES \ MAKE_SOFTWARE_EXCEPTION( SE_ERROR, \ PTHREAD_SERVICES_FACILITY, \ PTHREAD_SERVICES_ERROR ) #define PTHREAD_SERVICES_FACILITY 0xBAD #define PTHREAD_SERVICES_ERROR 0xDEED #else #ifdef __cplusplus class Pthread_exception {}; #else /* __cplusplus */ #warning File __FILE__, Line __LINE__: Cancellation not supported under C. #endif /* __cplusplus */ #endif /* _MSC_VER */ /* Function pointer to TryEnterCriticalSection if it exists; otherwise NULL */ extern BOOL (WINAPI *_pthread_try_enter_critical_section)(LPCRITICAL_SECTION); /* Declared in global.c */ extern int _pthread_processInitialized; extern pthread_key_t _pthread_selfThreadKey; extern pthread_key_t _pthread_cleanupKey; extern CRITICAL_SECTION _pthread_mutex_test_init_lock; extern CRITICAL_SECTION _pthread_cond_test_init_lock; #include #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* * ===================== * ===================== * Forward Declarations * ===================== * ===================== */ int _pthread_processInitialize (void); void _pthread_processTerminate (void); void _pthread_threadDestroy (pthread_t tid); void _pthread_cleanupStack (void); void *_pthread_threadStart (ThreadParms * threadParms); void _pthread_callUserDestroyRoutines (pthread_t thread); int _pthread_tkAssocCreate (ThreadKeyAssoc ** assocP, pthread_t thread, pthread_key_t key); void _pthread_tkAssocDestroy (ThreadKeyAssoc * assoc); int _pthread_sem_timedwait (sem_t * sem, const struct timespec * abstime); #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 */ #if defined(__CYGWIN32__) || defined(__CYGWIN__) /* * 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__ */ #endif /* _IMPLEMENT_H */