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executable file 112 lines (99 sloc) 3.851 kb
/*
* autostatic.c
*
* Description:
* This translation unit implements static auto-init and auto-exit logic.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2012 Pthreads-win32 contributors
*
* Homepage1: http://sourceware.org/pthreads-win32/
* Homepage2: http://sourceforge.net/projects/pthreads4w/
*
* 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
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "pthread.h"
#include "implement.h"
#if defined(PTW32_STATIC_LIB)
#if defined(PTW32_CONFIG_MINGW) || defined(_MSC_VER)
/* For an explanation of this code (at least the MSVC parts), refer to
*
* http://www.codeguru.com/cpp/misc/misc/threadsprocesses/article.php/c6945/
* ("Running Code Before and After Main")
*
* Compatibility with MSVC8 was cribbed from Boost:
*
* http://svn.boost.org/svn/boost/trunk/libs/thread/src/win32/tss_pe.cpp
*
* In addition to that, because we are in a static library, and the linker
* can't tell that the constructor/destructor functions are actually
* needed, we need a way to prevent the linker from optimizing away this
* module. The pthread_win32_autostatic_anchor() hack below (and in
* implement.h) does the job in a portable manner.
*/
static int on_process_init(void)
{
pthread_win32_process_attach_np ();
return 0;
}
static int on_process_exit(void)
{
pthread_win32_thread_detach_np ();
pthread_win32_process_detach_np ();
return 0;
}
#if defined(PTW32_CONFIG_MINGW)
__attribute__((section(".ctors"), used)) static int (*gcc_ctor)(void) = on_process_init;
__attribute__((section(".dtors"), used)) static int (*gcc_dtor)(void) = on_process_exit;
#elif defined(_MSC_VER)
# if _MSC_VER >= 1400 /* MSVC8 */
# pragma section(".CRT$XCU", long, read)
# pragma section(".CRT$XPU", long, read)
__declspec(allocate(".CRT$XCU")) static int (*msc_ctor)(void) = on_process_init;
__declspec(allocate(".CRT$XPU")) static int (*msc_dtor)(void) = on_process_exit;
# else
# pragma data_seg(".CRT$XCU")
static int (*msc_ctor)(void) = on_process_init;
# pragma data_seg(".CRT$XPU")
static int (*msc_dtor)(void) = on_process_exit;
# pragma data_seg() /* reset data segment */
# endif
#endif
#endif /* defined(PTW32_CONFIG_MINGW) || defined(_MSC_VER) */
/* This dummy function exists solely to be referenced by other modules
* (specifically, in implement.h), so that the linker can't optimize away
* this module. Don't call it.
*/
void ptw32_autostatic_anchor(void) { abort(); }
#endif /* PTW32_STATIC_LIB */
#if ! defined(PTW32_BUILD_INLINED)
/*
* Avoid "translation unit is empty" warnings
*/
typedef int foo;
#endif
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