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authorrpj <rpj>2002-02-18 03:16:52 +0000
committerrpj <rpj>2002-02-18 03:16:52 +0000
commita416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 (patch)
tree72f776cd64e48824a5578ff7a523bc69097143b4 /pthread_win32_attach_detach_np.c
parente6f1797e9e9925ae7f9dda54806ef8f52ae3ed07 (diff)
Major reorganisation of source code; new routine and tests added.
Diffstat (limited to 'pthread_win32_attach_detach_np.c')
-rw-r--r--pthread_win32_attach_detach_np.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/pthread_win32_attach_detach_np.c b/pthread_win32_attach_detach_np.c
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+++ b/pthread_win32_attach_detach_np.c
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+/*
+ * pthread_win32_attach_detach_np.c
+ *
+ * Description:
+ * This translation unit implements non-portable thread functions.
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2002 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@ise.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
+ */
+
+#include "pthread.h"
+#include "implement.h"
+
+/*
+ * Handle to kernel32.dll
+ */
+static HINSTANCE ptw32_h_kernel32;
+
+BOOL
+pthread_win32_process_attach_np ()
+{
+ BOOL result = TRUE;
+
+ result = ptw32_processInitialize ();
+#ifdef _UWIN
+ pthread_count++;
+#endif
+
+#ifndef TEST_ICE
+
+ /*
+ * Load KERNEL32 and try to get address of InterlockedCompareExchange
+ */
+ ptw32_h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL"));
+
+ ptw32_interlocked_compare_exchange =
+ (PTW32_INTERLOCKED_LONG (WINAPI *)(PTW32_INTERLOCKED_LPLONG, PTW32_INTERLOCKED_LONG, PTW32_INTERLOCKED_LONG))
+#if defined(NEED_UNICODE_CONSTS)
+ GetProcAddress(ptw32_h_kernel32,
+ (const TCHAR *)TEXT("InterlockedCompareExchange"));
+#else
+ GetProcAddress(ptw32_h_kernel32,
+ (LPCSTR) "InterlockedCompareExchange");
+#endif
+
+ if (ptw32_interlocked_compare_exchange == NULL)
+ {
+ ptw32_interlocked_compare_exchange = ptw32_InterlockedCompareExchange;
+
+ /*
+ * If InterlockedCompareExchange is not being used, then free
+ * the kernel32.dll handle now, rather than leaving it until
+ * DLL_PROCESS_DETACH.
+ *
+ * Note: this is not a pedantic exercise in freeing unused
+ * resources! It is a work-around for a bug in Windows 95
+ * (see microsoft knowledge base article, Q187684) which
+ * does Bad Things when FreeLibrary is called within
+ * the DLL_PROCESS_DETACH code, in certain situations.
+ * Since w95 just happens to be a platform which does not
+ * provide InterlockedCompareExchange, the bug will be
+ * effortlessly avoided.
+ */
+ (void) FreeLibrary(ptw32_h_kernel32);
+ ptw32_h_kernel32 = 0;
+ }
+
+#else /* TEST_ICE */
+
+ ptw32_interlocked_compare_exchange = ptw32_InterlockedCompareExchange;
+
+#endif /* TEST_ICE */
+
+ return result;
+}
+
+
+BOOL
+pthread_win32_process_detach_np ()
+{
+ if (ptw32_processInitialized)
+ {
+ pthread_t self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
+
+ /*
+ * Detached threads have their resources automatically
+ * cleaned up upon exit (others must be 'joined').
+ */
+ if (self != NULL &&
+ self->detachState == PTHREAD_CREATE_DETACHED)
+ {
+ pthread_setspecific (ptw32_selfThreadKey, NULL);
+ ptw32_threadDestroy (self);
+ }
+
+ /*
+ * The DLL is being unmapped into the process's address space
+ */
+ ptw32_processTerminate ();
+
+ if (ptw32_h_kernel32)
+ {
+ (void) FreeLibrary(ptw32_h_kernel32);
+ }
+ }
+
+ return TRUE;
+}
+
+BOOL
+pthread_win32_thread_attach_np ()
+{
+ return TRUE;
+}
+
+BOOL
+pthread_win32_thread_detach_np ()
+{
+ if (ptw32_processInitialized)
+ {
+ pthread_t self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
+
+ /*
+ * Detached threads have their resources automatically
+ * cleaned up upon exit (others must be 'joined').
+ */
+ if (self != NULL &&
+ self->detachState == PTHREAD_CREATE_DETACHED)
+ {
+ pthread_setspecific (ptw32_selfThreadKey, NULL);
+ ptw32_threadDestroy (self);
+ }
+ }
+
+ return TRUE;
+}