1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* tryentercs.c
*
*
* --------------------------------------------------------------------------
*
* 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
*
* --------------------------------------------------------------------------
*
* See if we have the TryEnterCriticalSection function.
* Does not use any part of pthreads.
*/
#include <windows.h>
#include <process.h>
#include <stdio.h>
/*
* Function pointer to TryEnterCriticalSection if it exists
* - otherwise NULL
*/
BOOL (WINAPI *_try_enter_critical_section)(LPCRITICAL_SECTION) = NULL;
/*
* Handle to kernel32.dll
*/
static HINSTANCE _h_kernel32;
int
main()
{
LPCRITICAL_SECTION lpcs = NULL;
SetLastError(0);
printf("Last Error [main enter] %ld\n", (long) GetLastError());
/*
* Load KERNEL32 and try to get address of TryEnterCriticalSection
*/
_h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL"));
_try_enter_critical_section =
(BOOL (PT_STDCALL *)(LPCRITICAL_SECTION))
GetProcAddress(_h_kernel32,
(LPCSTR) "TryEnterCriticalSection");
if (_try_enter_critical_section != NULL)
{
SetLastError(0);
(*_try_enter_critical_section)(lpcs);
printf("Last Error [try enter] %ld\n", (long) GetLastError());
}
(void) FreeLibrary(_h_kernel32);
printf("This system %s TryEnterCriticalSection.\n",
(_try_enter_critical_section == NULL) ? "DOES NOT SUPPORT" : "SUPPORTS");
printf("POSIX Mutexes will be based on Win32 %s.\n",
(_try_enter_critical_section == NULL) ? "Mutexes" : "Critical Sections");
return(0);
}
|
