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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/* $Id: semmutex-r0drv-nt.cpp $ */
/** @file
* IPRT - Mutex Semaphores, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define RTSEMMUTEX_WITHOUT_REMAPPING
#include "the-nt-kernel.h"
#include <iprt/semaphore.h>
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/asm.h>
#include <iprt/err.h>
#include "internal/magics.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* NT mutex semaphore.
*/
typedef struct RTSEMMUTEXINTERNAL
{
/** Magic value (RTSEMMUTEX_MAGIC). */
uint32_t volatile u32Magic;
#ifdef RT_USE_FAST_MUTEX
/** The fast mutex object. */
FAST_MUTEX Mutex;
#else
/** The NT Mutex object. */
KMUTEX Mutex;
#endif
} RTSEMMUTEXINTERNAL, *PRTSEMMUTEXINTERNAL;
RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX phMutexSem)
{
return RTSemMutexCreateEx(phMutexSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, NULL);
}
RTDECL(int) RTSemMutexCreateEx(PRTSEMMUTEX phMutexSem, uint32_t fFlags,
RTLOCKVALCLASS hClass, uint32_t uSubClass, const char *pszNameFmt, ...)
{
AssertReturn(!(fFlags & ~RTSEMMUTEX_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER);
RT_NOREF3(hClass, uSubClass, pszNameFmt);
AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)RTMemAlloc(sizeof(*pThis));
if (!pThis)
return VERR_NO_MEMORY;
pThis->u32Magic = RTSEMMUTEX_MAGIC;
#ifdef RT_USE_FAST_MUTEX
ExInitializeFastMutex(&pThis->Mutex);
#else
KeInitializeMutex(&pThis->Mutex, 0);
#endif
*phMutexSem = pThis;
return VINF_SUCCESS;
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
if (pThis == NIL_RTSEMMUTEX)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
/*
* Invalidate it and signal the object just in case.
*/
AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
RTMemFree(pThis);
return VINF_SUCCESS;
}
/**
* Internal worker for RTSemMutexRequest and RTSemMutexRequestNoResume
*
* @returns IPRT status code.
* @param hMutexSem The mutex handle.
* @param cMillies The timeout.
* @param fInterruptible Whether it's interruptible
* (RTSemMutexRequestNoResume) or not
* (RTSemMutexRequest).
*/
static int rtSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, BOOLEAN fInterruptible)
{
/*
* Validate input.
*/
PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
/*
* Get the mutex.
*/
#ifdef RT_USE_FAST_MUTEX
AssertMsg(cMillies == RT_INDEFINITE_WAIT, ("timeouts are not supported when using fast mutexes!\n"));
ExAcquireFastMutex(&pThis->Mutex);
return VINF_SUCCESS;
#else /* !RT_USE_FAST_MUTEX */
NTSTATUS rcNt;
if (cMillies == RT_INDEFINITE_WAIT)
rcNt = KeWaitForSingleObject(&pThis->Mutex, Executive, KernelMode, fInterruptible, NULL);
else
{
LARGE_INTEGER Timeout;
Timeout.QuadPart = -(int64_t)cMillies * 10000;
rcNt = KeWaitForSingleObject(&pThis->Mutex, Executive, KernelMode, fInterruptible, &Timeout);
}
switch (rcNt)
{
case STATUS_SUCCESS:
if (pThis->u32Magic == RTSEMMUTEX_MAGIC)
return VINF_SUCCESS;
return VERR_SEM_DESTROYED;
case STATUS_ALERTED:
case STATUS_USER_APC:
Assert(fInterruptible);
return VERR_INTERRUPTED;
case STATUS_TIMEOUT:
return VERR_TIMEOUT;
default:
AssertMsgFailed(("pThis->u32Magic=%RX32 pThis=%p: wait returned %lx!\n",
pThis->u32Magic, pThis, (long)rcNt));
return VERR_INTERNAL_ERROR;
}
#endif /* !RT_USE_FAST_MUTEX */
}
RTDECL(int) RTSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
{
return rtSemMutexRequest(hMutexSem, cMillies, FALSE /*fInterruptible*/);
}
RTDECL(int) RTSemMutexRequestDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
RT_NOREF1(uId); RT_SRC_POS_NOREF();
return RTSemMutexRequest(hMutexSem, cMillies);
}
RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
{
return rtSemMutexRequest(hMutexSem, cMillies, TRUE /*fInterruptible*/);
}
RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
RT_NOREF1(uId); RT_SRC_POS_NOREF();
return RTSemMutexRequestNoResume(hMutexSem, cMillies);
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
/*
* Validate input.
*/
PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE);
/*
* Release the mutex.
*/
#ifdef RT_USE_FAST_MUTEX
ExReleaseFastMutex(&pThis->Mutex);
#else
KeReleaseMutex(&pThis->Mutex, FALSE /*Wait*/);
#endif
return VINF_SUCCESS;
}
RTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem)
{
/*
* Validate.
*/
RTSEMMUTEXINTERNAL *pThis = hMutexSem;
AssertPtrReturn(pThis, false);
AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, false);
#ifdef RT_USE_FAST_MUTEX
return pThis->Mutex && pThis->Mutex->Owner != NULL;
#else
return KeReadStateMutex(&pThis->Mutex) == 1;
#endif
}
|
