reactos/lib/sdk/crt/process/thread.c

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/*
* msvcrt.dll thread functions
*
* Copyright 2000 Jon Griffiths
*
* 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 2.1 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <precomp.h>
#include <internal/wine/msvcrt.h>
#include <malloc.h>
#include <process.h>
void _amsg_exit (int errnum);
/* Index to TLS */
DWORD MSVCRT_tls_index;
typedef void (*_beginthread_start_routine_t)(void *);
typedef unsigned int (__stdcall *_beginthreadex_start_routine_t)(void *);
/********************************************************************/
typedef struct {
_beginthread_start_routine_t start_address;
void *arglist;
} _beginthread_trampoline_t;
/*********************************************************************
* msvcrt_get_thread_data
*
* Return the thread local storage structure.
*/
MSVCRT_thread_data *msvcrt_get_thread_data(void)
{
MSVCRT_thread_data *ptr;
DWORD err = GetLastError(); /* need to preserve last error */
if (!(ptr = TlsGetValue( MSVCRT_tls_index )))
{
if (!(ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ptr) )))
_amsg_exit( _RT_THREAD );
if (!TlsSetValue( MSVCRT_tls_index, ptr )) _amsg_exit( _RT_THREAD );
ptr->random_seed = 1;
}
SetLastError( err );
return ptr;
}
/*********************************************************************
* _beginthread_trampoline
*/
static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
{
_beginthread_trampoline_t local_trampoline;
/* Maybe it's just being paranoid, but freeing arg right
* away seems safer.
*/
memcpy(&local_trampoline,arg,sizeof(local_trampoline));
free(arg);
local_trampoline.start_address(local_trampoline.arglist);
return 0;
}
/*********************************************************************
* _beginthread (MSVCRT.@)
*/
uintptr_t _beginthread(
_beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
unsigned int stack_size, /* [in] Stack size for new thread or 0 */
void *arglist) /* [in] Argument list to be passed to new thread or NULL */
{
_beginthread_trampoline_t* trampoline;
TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
/* Allocate the trampoline here so that it is still valid when the thread
* starts... typically after this function has returned.
* _beginthread_trampoline is responsible for freeing the trampoline
*/
trampoline=malloc(sizeof(*trampoline));
trampoline->start_address = start_address;
trampoline->arglist = arglist;
/* FIXME */
return (uintptr_t)CreateThread(NULL, stack_size, _beginthread_trampoline,
trampoline, 0, NULL);
}
/*********************************************************************
* _endthread (MSVCRT.@)
*/
void CDECL _endthread(void)
{
TRACE("(void)\n");
/* FIXME */
ExitThread(0);
}