/* * 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 Ben Elliston and Ross Johnson * Copyright (C) 1999,2000,2001 Ross Johnson * * Contact Email: rpj@ise.canberra.edu.au * * 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 #if !defined(malloc) #include <malloc.h> #endif #if !defined(INT_MAX) #include <limits.h> #endif /* use local include files during development */ #include "semaphore.h" #include "sched.h" #if defined(HAVE_C_INLINE) || defined(__cplusplus) #define INLINE inline #else #define INLINE #endif #ifdef __MINGW32__ #define PTW32_INTERLOCKED_LONG long #define PTW32_INTERLOCKED_LPLONG long* #else #define PTW32_INTERLOCKED_LONG PVOID #define PTW32_INTERLOCKED_LPLONG PVOID* #endif 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_ { #ifdef _UWIN DWORD dummy[5]; #endif DWORD thread; HANDLE threadH; PThreadState state; PThreadDemise demise; void *exitStatus; void *parms; int ptErrno; int detachState; pthread_mutex_t cancelLock; /* Used for async-cancel safety */ int cancelState; int cancelType; HANDLE cancelEvent; #ifdef __CLEANUP_C jmp_buf start_mark; #endif /* __CLEANUP_C */ #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; struct sched_param param; int inheritsched; int contentionscope; #if HAVE_SIGSET_T sigset_t sigmask; #endif /* HAVE_SIGSET_T */ }; /* * ==================== * ==================== * Semaphores, Mutexes and Condition Variables * ==================== * ==================== */ struct sem_t_ { #ifdef NEED_SEM unsigned int value; CRITICAL_SECTION sem_lock_cs; HANDLE event; #else /* NEED_SEM */ HANDLE sem; #endif /* NEED_SEM */ }; #define PTW32_OBJECT_AUTO_INIT ((void *) -1) #define PTW32_OBJECT_INVALID NULL struct pthread_mutex_t_ { LONG lock_idx; /* Provides exclusive access to mutex state via the Interlocked* mechanism, as well as a count of the number of threads waiting on the mutex. */ int recursive_count; /* Number of unlocks a thread needs to perform before the lock is released (recursive mutexes only). */ int kind; /* Mutex type. */ pthread_t ownerThread; HANDLE wait_sema; /* Mutex release notification to waiting threads. */ }; struct pthread_mutexattr_t_ { int pshared; int kind; }; /* * Possible values, other than PTW32_OBJECT_INVALID, * for the "interlock" element in a spinlock. * * In this implementation, when a spinlock is initialised, * the number of cpus available to the process is checked. * If there is only one cpu then "interlock" is set equal to * PTW32_SPIN_USE_MUTEX and u.mutex is a initialised mutex. * If the number of cpus is greater than 1 then "interlock" * is set equal to PTW32_SPIN_UNLOCKED and the number is * stored in u.cpus. This arrangement allows the spinlock * routines to attempt an InterlockedCompareExchange on "interlock" * immediately and, if that fails, to try the inferior mutex. * * "u.cpus" isn't used for anything yet, but could be used at * some point to optimise spinlock behaviour. */ #define PTW32_SPIN_UNLOCKED (1) #define PTW32_SPIN_LOCKED (2) #define PTW32_SPIN_USE_MUTEX (3) struct pthread_spinlock_t_ { long interlock; /* Locking element for multi-cpus. */ union { int cpus; /* No. of cpus if multi cpus, or */ pthread_mutex_t mutex; /* mutex if single cpu. */ } u; }; struct pthread_barrier_t_ { unsigned int nCurrentBarrierHeight; unsigned int nInitialBarrierHeight; int iStep; int pshared; sem_t semBarrierBreeched[2]; }; struct pthread_barrierattr_t_ { int pshared; }; 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 nWaitersGone; /* Number of threads timed out */ 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 */ }; 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; }; #ifdef __CLEANUP_SEH /* * -------------------------------------------------------------- * 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 /* __CLEANUP_SEH */ /* * Services available through EXCEPTION_PTW32_SERVICES * and also used [as parameters to ptw32_throw()] as * generic exception selectors. */ #define PTW32_EPS_EXIT (1) #define PTW32_EPS_CANCEL (2) /* Mutex constants */ enum { PTW32_MUTEX_LOCK_IDX_INIT = -1, PTW32_MUTEX_OWNER_ANONYMOUS = 1 }; /* Useful macros */ #define PTW32_MAX(a,b) ((a)<(b)?(b):(a)) #define PTW32_MIN(a,b) ((a)>(b)?(b):(a)) /* Declared in global.c */ extern PTW32_INTERLOCKED_LONG (WINAPI *ptw32_interlocked_compare_exchange)(PTW32_INTERLOCKED_LPLONG, PTW32_INTERLOCKED_LONG, PTW32_INTERLOCKED_LONG); extern int ptw32_processInitialized; extern pthread_key_t ptw32_selfThreadKey; extern pthread_key_t ptw32_cleanupKey; extern int ptw32_mutex_default_kind; extern int ptw32_concurrency; 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 CRITICAL_SECTION ptw32_spinlock_test_init_lock; #ifdef _UWIN extern int pthread_count; #endif /* 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 * ===================== * ===================== */ PTW32_INTERLOCKED_LONG WINAPI ptw32_InterlockedCompareExchange(PTW32_INTERLOCKED_LPLONG location, PTW32_INTERLOCKED_LONG value, PTW32_INTERLOCKED_LONG comparand); int ptw32_processInitialize (void); void ptw32_processTerminate (void); void ptw32_threadDestroy (pthread_t tid); void ptw32_pop_cleanup_all (int execute); pthread_t ptw32_new (void); #if ! defined (__MINGW32__) || defined (__MSVCRT__) unsigned __stdcall #else void #endif ptw32_threadStart (void * vthreadParms); 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 */ #ifdef _UWIN_ # ifdef _MT # ifdef __cplusplus extern "C" { # endif _CRTIMP unsigned long __cdecl _beginthread (void (__cdecl *) (void *), unsigned, void *); _CRTIMP void __cdecl _endthread(void); _CRTIMP unsigned long __cdecl _beginthreadex(void *, unsigned, unsigned (__stdcall *) (void *), void *, unsigned, unsigned *); _CRTIMP void __cdecl _endthreadex(unsigned); # ifdef __cplusplus } # endif # endif #else # include <process.h> #endif /* * 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 */