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-rw-r--r--pthreads/implement.h1425
1 files changed, 715 insertions, 710 deletions
diff --git a/pthreads/implement.h b/pthreads/implement.h
index 3d9648365..d22750aa4 100644
--- a/pthreads/implement.h
+++ b/pthreads/implement.h
@@ -1,710 +1,715 @@
-/*
- * 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 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * 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 _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x400
-
-#include <windows.h>
-
-/*
- * In case windows.h doesn't define it (e.g. WinCE perhaps)
- */
-#ifdef WINCE
-typedef VOID (APIENTRY *PAPCFUNC)(DWORD dwParam);
-#endif
-
-/*
- * note: ETIMEDOUT is correctly defined in winsock.h
- */
-#include <winsock.h>
-
-/*
- * In case ETIMEDOUT hasn't been defined above somehow.
- */
-#ifndef ETIMEDOUT
-# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
-#endif
-
-#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
-
-#if defined (__MINGW32__) || (_MSC_VER >= 1300)
-#define PTW32_INTERLOCKED_LONG long
-#define PTW32_INTERLOCKED_LPLONG long*
-#else
-#define PTW32_INTERLOCKED_LONG PVOID
-#define PTW32_INTERLOCKED_LPLONG PVOID*
-#endif
-
-#if defined(__MINGW32__)
-#include <stdint.h>
-#elif defined(__BORLANDC__)
-#define int64_t ULONGLONG
-#else
-#define int64_t _int64
-#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 */
- PThreadStateCancelPending, /* Thread alive but is */
- /* has cancelation pending. */
- PThreadStateCanceling, /* Thread alive but is */
- /* in the process of terminating */
- /* due to a cancellation request */
- PThreadStateException, /* Thread alive but exiting */
- /* due to an exception */
- PThreadStateLast
-}
-PThreadState;
-
-
-typedef struct ptw32_thread_t_ ptw32_thread_t;
-
-struct ptw32_thread_t_
-{
-#ifdef _UWIN
- DWORD dummy[5];
-#endif
- DWORD thread;
- HANDLE threadH; /* Win32 thread handle - POSIX thread is invalid if threadH == 0 */
- pthread_t ptHandle; /* This thread's permanent pthread_t handle */
- ptw32_thread_t * prevReuse; /* Links threads on reuse stack */
- volatile PThreadState state;
- void *exitStatus;
- void *parms;
- int ptErrno;
- int detachState;
- pthread_mutex_t threadLock; /* Used for serialised access to public thread state */
- int sched_priority; /* As set, not as currently is */
- 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;
- void *nextAssoc;
-};
-
-
-/*
- * 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_
-{
- int value;
- pthread_mutex_t lock;
- HANDLE sem;
-#ifdef NEED_SEM
- int leftToUnblock;
-#endif
-};
-
-#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.
- 0: unlocked/free.
- 1: locked - no other waiters.
- -1: locked - with possible other waiters.
- */
- 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 event; /* 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 keyLock;
- 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 */
- pthread_cond_t next; /* Doubly linked list */
- pthread_cond_t prev;
-};
-
-
-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;
-};
-
-/*
- * MCS lock queue node - see ptw32_MCS_lock.c
- */
-struct ptw32_mcs_node_t_
-{
- struct ptw32_mcs_node_t_ **lock; /* ptr to tail of queue */
- struct ptw32_mcs_node_t_ *next; /* ptr to successor in queue */
- LONG readyFlag; /* set after lock is released by
- predecessor */
- LONG nextFlag; /* set after 'next' ptr is set by
- successor */
-};
-
-typedef struct ptw32_mcs_node_t_ ptw32_mcs_local_node_t;
-typedef struct ptw32_mcs_node_t_ *ptw32_mcs_lock_t;
-
-
-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.
- *
- * Graphically, the arrangement is as follows, where:
- *
- * K - Key with destructor
- * (head of chain is key->threads)
- * T - Thread that has called pthread_setspecific(Kn)
- * (head of chain is thread->keys)
- * A - Association. Each association is a node at the
- * intersection of two doubly-linked lists.
- *
- * T1 T2 T3
- * | | |
- * | | |
- * K1 -----+-----A-----A----->
- * | | |
- * | | |
- * K2 -----A-----A-----+----->
- * | | |
- * | | |
- * K3 -----A-----+-----A----->
- * | | |
- * | | |
- * V V V
- *
- * Access to the association is guarded by two locks: the key's
- * general lock (guarding the row) and the thread's general
- * lock (guarding the column). This avoids the need for a
- * dedicated lock for each association, which not only consumes
- * more handles but requires that: before the lock handle can
- * be released - both the key must be deleted and the thread
- * must have called the destructor. The two-lock arrangement
- * allows the resources to be freed as soon as either thread or
- * key is concluded.
- *
- * To avoid deadlock: whenever both locks are required, the key
- * and thread locks are always acquired in the order: key lock
- * then thread lock. An exception to this exists when a thread
- * calls the destructors, however this is done carefully to
- * avoid deadlock.
- *
- * An association is created when a thread first calls
- * pthread_setspecific() on a key that has a specified
- * destructor.
- *
- * An association is destroyed either immediately after the
- * thread calls the key destructor function on thread exit, or
- * when the key is deleted.
- *
- * Attributes:
- * thread
- * reference to the thread that owns the
- * association. This is actually the pointer to the
- * thread struct itself. Since the association is
- * destroyed before the thread exits, this can never
- * point to a different logical thread to the one that
- * created the assoc, i.e. after thread struct reuse.
- *
- * key
- * reference to the key that owns the association.
- *
- * 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.
- *
- * prevKey
- * Similarly.
- *
- * 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.
- *
- * prevThread
- * Similarly.
- *
- * Notes:
- * 1) As soon as either the key or the thread is no longer
- * referencing the association, it can be destroyed. The
- * association will be removed from both chains.
- *
- * 2) Under WIN32, an association is only created by
- * pthread_setspecific if the user provided a
- * destroyRoutine when they created the key.
- *
- *
- */
- ptw32_thread_t * thread;
- pthread_key_t key;
- ThreadKeyAssoc *nextKey;
- ThreadKeyAssoc *nextThread;
- ThreadKeyAssoc *prevKey;
- ThreadKeyAssoc *prevThread;
-};
-
-
-#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)
-
-
-/* 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);
-
-/* Declared in pthread_cancel.c */
-extern DWORD (*ptw32_register_cancelation) (PAPCFUNC, HANDLE, DWORD);
-
-/* Thread Reuse stack bottom marker. Must not be NULL or any valid pointer to memory. */
-#define PTW32_THREAD_REUSE_EMPTY ((ptw32_thread_t *) 1)
-
-extern int ptw32_processInitialized;
-extern ptw32_thread_t * ptw32_threadReuseTop;
-extern ptw32_thread_t * ptw32_threadReuseBottom;
-extern pthread_key_t ptw32_selfThreadKey;
-extern pthread_key_t ptw32_cleanupKey;
-extern pthread_cond_t ptw32_cond_list_head;
-extern pthread_cond_t ptw32_cond_list_tail;
-
-extern int ptw32_mutex_default_kind;
-
-extern int ptw32_concurrency;
-
-extern int ptw32_features;
-
-extern BOOL ptw32_smp_system; /* True: SMP system, False: Uni-processor system */
-
-extern CRITICAL_SECTION ptw32_thread_reuse_lock;
-extern CRITICAL_SECTION ptw32_mutex_test_init_lock;
-extern CRITICAL_SECTION ptw32_cond_list_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
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif /* __cplusplus */
-
-/*
- * =====================
- * =====================
- * Forward Declarations
- * =====================
- * =====================
- */
-
- int ptw32_is_attr (const pthread_attr_t * attr);
-
- int ptw32_cond_check_need_init (pthread_cond_t * cond);
- int ptw32_mutex_check_need_init (pthread_mutex_t * mutex);
- int ptw32_rwlock_check_need_init (pthread_rwlock_t * rwlock);
-
- PTW32_INTERLOCKED_LONG WINAPI
- ptw32_InterlockedCompareExchange (PTW32_INTERLOCKED_LPLONG location,
- PTW32_INTERLOCKED_LONG value,
- PTW32_INTERLOCKED_LONG comparand);
-
- LONG WINAPI
- ptw32_InterlockedExchange (LPLONG location,
- LONG value);
-
- DWORD
- ptw32_RegisterCancelation (PAPCFUNC callback,
- HANDLE threadH, DWORD callback_arg);
-
- 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);
-
- pthread_t ptw32_threadReusePop (void);
-
- void ptw32_threadReusePush (pthread_t thread);
-
- int ptw32_getprocessors (int *count);
-
- int ptw32_setthreadpriority (pthread_t thread, int policy, int priority);
-
- void ptw32_rwlock_cancelwrwait (void *arg);
-
-#if ! defined (__MINGW32__) || defined (__MSVCRT__)
- unsigned __stdcall
-#else
- void
-#endif
- ptw32_threadStart (void *vthreadParms);
-
- void ptw32_callUserDestroyRoutines (pthread_t thread);
-
- int ptw32_tkAssocCreate (ptw32_thread_t * thread, pthread_key_t key);
-
- void ptw32_tkAssocDestroy (ThreadKeyAssoc * assoc);
-
- int ptw32_semwait (sem_t * sem);
-
- DWORD ptw32_relmillisecs (const struct timespec * abstime);
-
- void ptw32_mcs_lock_acquire (ptw32_mcs_lock_t * lock, ptw32_mcs_local_node_t * node);
-
- void ptw32_mcs_lock_release (ptw32_mcs_local_node_t * node);
-
-#ifdef NEED_FTIME
- void ptw32_timespec_to_filetime (const struct timespec *ts, FILETIME * ft);
- void ptw32_filetime_to_timespec (const FILETIME * ft, struct timespec *ts);
-#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
-}
-#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
-
-
-/*
- * Defaults. Could be overridden when building the inlined version of the dll.
- * See ptw32_InterlockedCompareExchange.c
- */
-#ifndef PTW32_INTERLOCKED_COMPARE_EXCHANGE
-#define PTW32_INTERLOCKED_COMPARE_EXCHANGE ptw32_interlocked_compare_exchange
-#endif
-
-#ifndef PTW32_INTERLOCKED_EXCHANGE
-#define PTW32_INTERLOCKED_EXCHANGE InterlockedExchange
-#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 */
+/*
+ * 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 John E. Bossom
+ * Copyright(C) 1999,2005 Pthreads-win32 contributors
+ *
+ * Contact Email: Ross.Johnson@homemail.com.au
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library in the file COPYING.LIB;
+ * 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 _WIN32_WINNT
+#undef _WIN32_WINNT
+#endif
+#define _WIN32_WINNT 0x400
+
+#include <windows.h>
+
+/*
+ * In case windows.h doesn't define it (e.g. WinCE perhaps)
+ */
+#ifdef WINCE
+typedef VOID (APIENTRY *PAPCFUNC)(DWORD dwParam);
+#endif
+
+/*
+ * note: ETIMEDOUT is correctly defined in winsock.h
+ */
+#include <winsock.h>
+
+/*
+ * In case ETIMEDOUT hasn't been defined above somehow.
+ */
+#ifndef ETIMEDOUT
+# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
+#endif
+
+#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
+
+#if defined (__MINGW32__) || (_MSC_VER >= 1300)
+#define PTW32_INTERLOCKED_LONG long
+#define PTW32_INTERLOCKED_LPLONG long*
+#else
+#define PTW32_INTERLOCKED_LONG PVOID
+#define PTW32_INTERLOCKED_LPLONG PVOID*
+#endif
+
+#if defined(__MINGW32__)
+#include <stdint.h>
+#elif defined(__BORLANDC__)
+#define int64_t ULONGLONG
+#else
+#define int64_t _int64
+#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 */
+ PThreadStateCancelPending, /* Thread alive but is */
+ /* has cancelation pending. */
+ PThreadStateCanceling, /* Thread alive but is */
+ /* in the process of terminating */
+ /* due to a cancellation request */
+ PThreadStateException, /* Thread alive but exiting */
+ /* due to an exception */
+ PThreadStateLast
+}
+PThreadState;
+
+
+typedef struct ptw32_thread_t_ ptw32_thread_t;
+
+struct ptw32_thread_t_
+{
+#ifdef _UWIN
+ DWORD dummy[5];
+#endif
+ DWORD thread;
+ HANDLE threadH; /* Win32 thread handle - POSIX thread is invalid if threadH == 0 */
+ pthread_t ptHandle; /* This thread's permanent pthread_t handle */
+ ptw32_thread_t * prevReuse; /* Links threads on reuse stack */
+ volatile PThreadState state;
+ void *exitStatus;
+ void *parms;
+ int ptErrno;
+ int detachState;
+ pthread_mutex_t threadLock; /* Used for serialised access to public thread state */
+ int sched_priority; /* As set, not as currently is */
+ 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;
+ void *nextAssoc;
+};
+
+
+/*
+ * 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_
+{
+ int value;
+ pthread_mutex_t lock;
+ HANDLE sem;
+#ifdef NEED_SEM
+ int leftToUnblock;
+#endif
+};
+
+#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.
+ 0: unlocked/free.
+ 1: locked - no other waiters.
+ -1: locked - with possible other waiters.
+ */
+ 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 event; /* 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;
+};
+
+/*
+ * MCS lock queue node - see ptw32_MCS_lock.c
+ */
+struct ptw32_mcs_node_t_
+{
+ struct ptw32_mcs_node_t_ **lock; /* ptr to tail of queue */
+ struct ptw32_mcs_node_t_ *next; /* ptr to successor in queue */
+ LONG readyFlag; /* set after lock is released by
+ predecessor */
+ LONG nextFlag; /* set after 'next' ptr is set by
+ successor */
+};
+
+typedef struct ptw32_mcs_node_t_ ptw32_mcs_local_node_t;
+typedef struct ptw32_mcs_node_t_ *ptw32_mcs_lock_t;
+
+
+struct pthread_barrier_t_
+{
+ unsigned int nCurrentBarrierHeight;
+ unsigned int nInitialBarrierHeight;
+ int pshared;
+ sem_t semBarrierBreeched;
+ void * lock; /* MCS lock */
+ ptw32_mcs_local_node_t proxynode;
+};
+
+struct pthread_barrierattr_t_
+{
+ int pshared;
+};
+
+struct pthread_key_t_
+{
+ DWORD key;
+ void (*destructor) (void *);
+ pthread_mutex_t keyLock;
+ void *threads;
+};
+
+
+typedef struct ThreadParms ThreadParms;
+
+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 */
+ pthread_cond_t next; /* Doubly linked list */
+ pthread_cond_t prev;
+};
+
+
+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;
+};
+
+typedef struct ThreadKeyAssoc ThreadKeyAssoc;
+
+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.
+ *
+ * Graphically, the arrangement is as follows, where:
+ *
+ * K - Key with destructor
+ * (head of chain is key->threads)
+ * T - Thread that has called pthread_setspecific(Kn)
+ * (head of chain is thread->keys)
+ * A - Association. Each association is a node at the
+ * intersection of two doubly-linked lists.
+ *
+ * T1 T2 T3
+ * | | |
+ * | | |
+ * K1 -----+-----A-----A----->
+ * | | |
+ * | | |
+ * K2 -----A-----A-----+----->
+ * | | |
+ * | | |
+ * K3 -----A-----+-----A----->
+ * | | |
+ * | | |
+ * V V V
+ *
+ * Access to the association is guarded by two locks: the key's
+ * general lock (guarding the row) and the thread's general
+ * lock (guarding the column). This avoids the need for a
+ * dedicated lock for each association, which not only consumes
+ * more handles but requires that the lock resources persist
+ * until both the key is deleted and the thread has called the
+ * destructor. The two-lock arrangement allows those resources
+ * to be freed as soon as either thread or key is concluded.
+ *
+ * To avoid deadlock, whenever both locks are required both the
+ * key and thread locks are acquired consistently in the order
+ * "key lock then thread lock". An exception to this exists
+ * when a thread calls the destructors, however, this is done
+ * carefully (but inelegantly) to avoid deadlock.
+ *
+ * An association is created when a thread first calls
+ * pthread_setspecific() on a key that has a specified
+ * destructor.
+ *
+ * An association is destroyed either immediately after the
+ * thread calls the key destructor function on thread exit, or
+ * when the key is deleted.
+ *
+ * Attributes:
+ * thread
+ * reference to the thread that owns the
+ * association. This is actually the pointer to the
+ * thread struct itself. Since the association is
+ * destroyed before the thread exits, this can never
+ * point to a different logical thread to the one that
+ * created the assoc, i.e. after thread struct reuse.
+ *
+ * key
+ * reference to the key that owns the association.
+ *
+ * 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.
+ *
+ * prevKey
+ * Similarly.
+ *
+ * nextThread
+ * The pthread_key_t->threads attribute is the head of
+ * a chain of associations 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.
+ *
+ * prevThread
+ * Similarly.
+ *
+ * Notes:
+ * 1) As soon as either the key or the thread is no longer
+ * referencing the association, it can be destroyed. The
+ * association will be removed from both chains.
+ *
+ * 2) Under WIN32, an association is only created by
+ * pthread_setspecific if the user provided a
+ * destroyRoutine when they created the key.
+ *
+ *
+ */
+ ptw32_thread_t * thread;
+ pthread_key_t key;
+ ThreadKeyAssoc *nextKey;
+ ThreadKeyAssoc *nextThread;
+ ThreadKeyAssoc *prevKey;
+ ThreadKeyAssoc *prevThread;
+};
+
+
+#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 laid 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)
+
+
+/* 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);
+
+/* Declared in pthread_cancel.c */
+extern DWORD (*ptw32_register_cancelation) (PAPCFUNC, HANDLE, DWORD);
+
+/* Thread Reuse stack bottom marker. Must not be NULL or any valid pointer to memory. */
+#define PTW32_THREAD_REUSE_EMPTY ((ptw32_thread_t *) 1)
+
+extern int ptw32_processInitialized;
+extern ptw32_thread_t * ptw32_threadReuseTop;
+extern ptw32_thread_t * ptw32_threadReuseBottom;
+extern pthread_key_t ptw32_selfThreadKey;
+extern pthread_key_t ptw32_cleanupKey;
+extern pthread_cond_t ptw32_cond_list_head;
+extern pthread_cond_t ptw32_cond_list_tail;
+
+extern int ptw32_mutex_default_kind;
+
+extern int ptw32_concurrency;
+
+extern int ptw32_features;
+
+extern BOOL ptw32_smp_system; /* True: SMP system, False: Uni-processor system */
+
+extern CRITICAL_SECTION ptw32_thread_reuse_lock;
+extern CRITICAL_SECTION ptw32_mutex_test_init_lock;
+extern CRITICAL_SECTION ptw32_cond_list_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
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+/*
+ * =====================
+ * =====================
+ * Forward Declarations
+ * =====================
+ * =====================
+ */
+
+ int ptw32_is_attr (const pthread_attr_t * attr);
+
+ int ptw32_cond_check_need_init (pthread_cond_t * cond);
+ int ptw32_mutex_check_need_init (pthread_mutex_t * mutex);
+ int ptw32_rwlock_check_need_init (pthread_rwlock_t * rwlock);
+
+ PTW32_INTERLOCKED_LONG WINAPI
+ ptw32_InterlockedCompareExchange (PTW32_INTERLOCKED_LPLONG location,
+ PTW32_INTERLOCKED_LONG value,
+ PTW32_INTERLOCKED_LONG comparand);
+
+ LONG WINAPI
+ ptw32_InterlockedExchange (LPLONG location,
+ LONG value);
+
+ DWORD
+ ptw32_RegisterCancelation (PAPCFUNC callback,
+ HANDLE threadH, DWORD callback_arg);
+
+ 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);
+
+ pthread_t ptw32_threadReusePop (void);
+
+ void ptw32_threadReusePush (pthread_t thread);
+
+ int ptw32_getprocessors (int *count);
+
+ int ptw32_setthreadpriority (pthread_t thread, int policy, int priority);
+
+ void ptw32_rwlock_cancelwrwait (void *arg);
+
+#if ! defined (__MINGW32__) || defined (__MSVCRT__)
+ unsigned __stdcall
+#else
+ void
+#endif
+ ptw32_threadStart (void *vthreadParms);
+
+ void ptw32_callUserDestroyRoutines (pthread_t thread);
+
+ int ptw32_tkAssocCreate (ptw32_thread_t * thread, pthread_key_t key);
+
+ void ptw32_tkAssocDestroy (ThreadKeyAssoc * assoc);
+
+ int ptw32_semwait (sem_t * sem);
+
+ DWORD ptw32_relmillisecs (const struct timespec * abstime);
+
+ void ptw32_mcs_lock_acquire (ptw32_mcs_lock_t * lock, ptw32_mcs_local_node_t * node);
+
+ int ptw32_mcs_lock_try_acquire (ptw32_mcs_lock_t * lock, ptw32_mcs_local_node_t * node);
+
+ void ptw32_mcs_lock_release (ptw32_mcs_local_node_t * node);
+
+ void ptw32_mcs_node_substitute (ptw32_mcs_local_node_t * new_node, ptw32_mcs_local_node_t * old_node);
+
+#ifdef NEED_FTIME
+ void ptw32_timespec_to_filetime (const struct timespec *ts, FILETIME * ft);
+ void ptw32_filetime_to_timespec (const FILETIME * ft, struct timespec *ts);
+#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
+}
+#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
+
+
+/*
+ * Defaults. Could be overridden when building the inlined version of the dll.
+ * See ptw32_InterlockedCompareExchange.c
+ */
+#ifndef PTW32_INTERLOCKED_COMPARE_EXCHANGE
+# define PTW32_INTERLOCKED_COMPARE_EXCHANGE ptw32_interlocked_compare_exchange
+# endif
+
+#ifndef PTW32_INTERLOCKED_EXCHANGE
+#define PTW32_INTERLOCKED_EXCHANGE InterlockedExchange
+#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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 01:54:37 +0000