112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/*
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* autostatic.c
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*
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* Description:
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* This translation unit implements static auto-init and auto-exit logic.
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2012 Pthreads-win32 contributors
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*
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* Homepage1: http://sourceware.org/pthreads-win32/
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* Homepage2: http://sourceforge.net/projects/pthreads4w/
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "pthread.h"
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#include "implement.h"
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#if defined(PTW32_STATIC_LIB)
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#if defined(PTW32_CONFIG_MINGW) || defined(_MSC_VER)
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/* For an explanation of this code (at least the MSVC parts), refer to
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*
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* http://www.codeguru.com/cpp/misc/misc/threadsprocesses/article.php/c6945/
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* ("Running Code Before and After Main")
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*
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* Compatibility with MSVC8 was cribbed from Boost:
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*
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* http://svn.boost.org/svn/boost/trunk/libs/thread/src/win32/tss_pe.cpp
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*
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* In addition to that, because we are in a static library, and the linker
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* can't tell that the constructor/destructor functions are actually
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* needed, we need a way to prevent the linker from optimizing away this
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* module. The pthread_win32_autostatic_anchor() hack below (and in
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* implement.h) does the job in a portable manner.
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*/
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static int on_process_init(void)
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{
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pthread_win32_process_attach_np ();
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return 0;
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}
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static int on_process_exit(void)
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{
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pthread_win32_thread_detach_np ();
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pthread_win32_process_detach_np ();
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return 0;
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}
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#if defined(PTW32_CONFIG_MINGW)
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__attribute__((section(".ctors"), used)) static int (*gcc_ctor)(void) = on_process_init;
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__attribute__((section(".dtors"), used)) static int (*gcc_dtor)(void) = on_process_exit;
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#elif defined(_MSC_VER)
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# if _MSC_VER >= 1400 /* MSVC8 */
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# pragma section(".CRT$XCU", long, read)
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# pragma section(".CRT$XPU", long, read)
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__declspec(allocate(".CRT$XCU")) static int (*msc_ctor)(void) = on_process_init;
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__declspec(allocate(".CRT$XPU")) static int (*msc_dtor)(void) = on_process_exit;
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# else
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# pragma data_seg(".CRT$XCU")
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static int (*msc_ctor)(void) = on_process_init;
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# pragma data_seg(".CRT$XPU")
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static int (*msc_dtor)(void) = on_process_exit;
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# pragma data_seg() /* reset data segment */
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# endif
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#endif
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#endif /* defined(PTW32_CONFIG_MINGW) || defined(_MSC_VER) */
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/* This dummy function exists solely to be referenced by other modules
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* (specifically, in implement.h), so that the linker can't optimize away
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* this module. Don't call it.
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*/
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void ptw32_autostatic_anchor(void) { abort(); }
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#endif /* PTW32_STATIC_LIB */
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#if ! defined(PTW32_BUILD_INLINED)
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/*
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* Avoid "translation unit is empty" warnings
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*/
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typedef int foo;
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#endif
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