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2 * Copyright (c) Kongsberg Oil & Gas Technologies AS
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31\**************************************************************************/
32
33/* this file should only be included from mutex.c */
34
35#include "glue/win32api.h"
36
37/* FIXME: some of the cases where we are robust and catch and return
38   error codes should probably be replaced by asserts.  Should audit
39   the code versus the Win32 API documentation and fix.  20030604 mortene. */
40
41static int
42win32_mutex_struct_init(cc_mutex * mutex_struct)
43{
44  mutex_struct->w32thread.mutexhandle = CreateMutex(NULL, FALSE, NULL);
45  if (mutex_struct->w32thread.mutexhandle == NULL) {
46    if (COIN_DEBUG) {
47      cc_win32_print_error("win32_mutex_struct_init",
48                           "CreateMutex()", GetLastError());
49    }
50    return CC_ERROR;
51  }
52  return CC_OK;
53}
54
55static int
56win32_mutex_struct_clean(cc_mutex * mutex_struct)
57{
58  BOOL status = CloseHandle(mutex_struct->w32thread.mutexhandle);
59  if (status == FALSE) {
60    if (COIN_DEBUG) {
61      cc_win32_print_error("win32_mutex_struct_clean",
62                           "CloseHandle()", GetLastError());
63    }
64    return CC_ERROR;
65  }
66  return CC_OK;
67}
68
69static int
70win32_mutex_lock(cc_mutex * mutex)
71{
72  DWORD status;
73  status = WaitForSingleObject(mutex->w32thread.mutexhandle, INFINITE);
74  if (status == WAIT_FAILED) {
75    if (COIN_DEBUG) {
76      cc_win32_print_error("win32_mutex_lock",
77                           "WaitSingleObject()", GetLastError());
78    }
79    return CC_ERROR;
80  }
81  return CC_OK;
82}
83
84static int
85win32_mutex_try_lock(cc_mutex * mutex)
86{
87  DWORD status;
88  status = WaitForSingleObject(mutex->w32thread.mutexhandle, 0);
89  if (status == WAIT_TIMEOUT)
90    return CC_BUSY;
91  else if ((status == WAIT_OBJECT_0) || (status == WAIT_ABANDONED))
92    return CC_OK;
93
94  /* if we get here there was an error */
95  if (COIN_DEBUG) {
96    cc_win32_print_error("win32_mutex_try_lock",
97                         "WaitSingleObject()", GetLastError());
98  }
99  return CC_ERROR;
100}
101
102static int
103win32_mutex_unlock(cc_mutex * mutex)
104{
105  BOOL status = ReleaseMutex(mutex->w32thread.mutexhandle);
106  if (status == FALSE) {
107    if (COIN_DEBUG) {
108      cc_win32_print_error("win32_mutex_unlock",
109                           "ReleaseMutex()", GetLastError());
110    }
111    return CC_ERROR;
112  }
113  return CC_OK;
114}
115