utmutex.c revision 1.1.1.2.4.2
1 1.1.1.2.4.2 rmind /******************************************************************************* 2 1.1.1.2.4.2 rmind * 3 1.1.1.2.4.2 rmind * Module Name: utmutex - local mutex support 4 1.1.1.2.4.2 rmind * 5 1.1.1.2.4.2 rmind ******************************************************************************/ 6 1.1.1.2.4.2 rmind 7 1.1.1.2.4.2 rmind /* 8 1.1.1.2.4.2 rmind * Copyright (C) 2000 - 2011, Intel Corp. 9 1.1.1.2.4.2 rmind * All rights reserved. 10 1.1.1.2.4.2 rmind * 11 1.1.1.2.4.2 rmind * Redistribution and use in source and binary forms, with or without 12 1.1.1.2.4.2 rmind * modification, are permitted provided that the following conditions 13 1.1.1.2.4.2 rmind * are met: 14 1.1.1.2.4.2 rmind * 1. Redistributions of source code must retain the above copyright 15 1.1.1.2.4.2 rmind * notice, this list of conditions, and the following disclaimer, 16 1.1.1.2.4.2 rmind * without modification. 17 1.1.1.2.4.2 rmind * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 1.1.1.2.4.2 rmind * substantially similar to the "NO WARRANTY" disclaimer below 19 1.1.1.2.4.2 rmind * ("Disclaimer") and any redistribution must be conditioned upon 20 1.1.1.2.4.2 rmind * including a substantially similar Disclaimer requirement for further 21 1.1.1.2.4.2 rmind * binary redistribution. 22 1.1.1.2.4.2 rmind * 3. Neither the names of the above-listed copyright holders nor the names 23 1.1.1.2.4.2 rmind * of any contributors may be used to endorse or promote products derived 24 1.1.1.2.4.2 rmind * from this software without specific prior written permission. 25 1.1.1.2.4.2 rmind * 26 1.1.1.2.4.2 rmind * Alternatively, this software may be distributed under the terms of the 27 1.1.1.2.4.2 rmind * GNU General Public License ("GPL") version 2 as published by the Free 28 1.1.1.2.4.2 rmind * Software Foundation. 29 1.1.1.2.4.2 rmind * 30 1.1.1.2.4.2 rmind * NO WARRANTY 31 1.1.1.2.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 1.1.1.2.4.2 rmind * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 1.1.1.2.4.2 rmind * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 1.1.1.2.4.2 rmind * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 1.1.1.2.4.2 rmind * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.1.1.2.4.2 rmind * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.1.1.2.4.2 rmind * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.1.1.2.4.2 rmind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 1.1.1.2.4.2 rmind * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 1.1.1.2.4.2 rmind * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 1.1.1.2.4.2 rmind * POSSIBILITY OF SUCH DAMAGES. 42 1.1.1.2.4.2 rmind */ 43 1.1.1.2.4.2 rmind 44 1.1.1.2.4.2 rmind 45 1.1.1.2.4.2 rmind #define __UTMUTEX_C__ 46 1.1.1.2.4.2 rmind 47 1.1.1.2.4.2 rmind #include "acpi.h" 48 1.1.1.2.4.2 rmind #include "accommon.h" 49 1.1.1.2.4.2 rmind 50 1.1.1.2.4.2 rmind #define _COMPONENT ACPI_UTILITIES 51 1.1.1.2.4.2 rmind ACPI_MODULE_NAME ("utmutex") 52 1.1.1.2.4.2 rmind 53 1.1.1.2.4.2 rmind /* Local prototypes */ 54 1.1.1.2.4.2 rmind 55 1.1.1.2.4.2 rmind static ACPI_STATUS 56 1.1.1.2.4.2 rmind AcpiUtCreateMutex ( 57 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId); 58 1.1.1.2.4.2 rmind 59 1.1.1.2.4.2 rmind static void 60 1.1.1.2.4.2 rmind AcpiUtDeleteMutex ( 61 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId); 62 1.1.1.2.4.2 rmind 63 1.1.1.2.4.2 rmind 64 1.1.1.2.4.2 rmind /******************************************************************************* 65 1.1.1.2.4.2 rmind * 66 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtMutexInitialize 67 1.1.1.2.4.2 rmind * 68 1.1.1.2.4.2 rmind * PARAMETERS: None. 69 1.1.1.2.4.2 rmind * 70 1.1.1.2.4.2 rmind * RETURN: Status 71 1.1.1.2.4.2 rmind * 72 1.1.1.2.4.2 rmind * DESCRIPTION: Create the system mutex objects. This includes mutexes, 73 1.1.1.2.4.2 rmind * spin locks, and reader/writer locks. 74 1.1.1.2.4.2 rmind * 75 1.1.1.2.4.2 rmind ******************************************************************************/ 76 1.1.1.2.4.2 rmind 77 1.1.1.2.4.2 rmind ACPI_STATUS 78 1.1.1.2.4.2 rmind AcpiUtMutexInitialize ( 79 1.1.1.2.4.2 rmind void) 80 1.1.1.2.4.2 rmind { 81 1.1.1.2.4.2 rmind UINT32 i; 82 1.1.1.2.4.2 rmind ACPI_STATUS Status; 83 1.1.1.2.4.2 rmind 84 1.1.1.2.4.2 rmind 85 1.1.1.2.4.2 rmind ACPI_FUNCTION_TRACE (UtMutexInitialize); 86 1.1.1.2.4.2 rmind 87 1.1.1.2.4.2 rmind 88 1.1.1.2.4.2 rmind /* Create each of the predefined mutex objects */ 89 1.1.1.2.4.2 rmind 90 1.1.1.2.4.2 rmind for (i = 0; i < ACPI_NUM_MUTEX; i++) 91 1.1.1.2.4.2 rmind { 92 1.1.1.2.4.2 rmind Status = AcpiUtCreateMutex (i); 93 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 94 1.1.1.2.4.2 rmind { 95 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 96 1.1.1.2.4.2 rmind } 97 1.1.1.2.4.2 rmind } 98 1.1.1.2.4.2 rmind 99 1.1.1.2.4.2 rmind /* Create the spinlocks for use at interrupt level */ 100 1.1.1.2.4.2 rmind 101 1.1.1.2.4.2 rmind Status = AcpiOsCreateLock (&AcpiGbl_GpeLock); 102 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 103 1.1.1.2.4.2 rmind { 104 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 105 1.1.1.2.4.2 rmind } 106 1.1.1.2.4.2 rmind 107 1.1.1.2.4.2 rmind Status = AcpiOsCreateLock (&AcpiGbl_HardwareLock); 108 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 109 1.1.1.2.4.2 rmind { 110 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 111 1.1.1.2.4.2 rmind } 112 1.1.1.2.4.2 rmind 113 1.1.1.2.4.2 rmind /* Mutex for _OSI support */ 114 1.1.1.2.4.2 rmind Status = AcpiOsCreateMutex (&AcpiGbl_OsiMutex); 115 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 116 1.1.1.2.4.2 rmind { 117 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 118 1.1.1.2.4.2 rmind } 119 1.1.1.2.4.2 rmind 120 1.1.1.2.4.2 rmind /* Create the reader/writer lock for namespace access */ 121 1.1.1.2.4.2 rmind 122 1.1.1.2.4.2 rmind Status = AcpiUtCreateRwLock (&AcpiGbl_NamespaceRwLock); 123 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 124 1.1.1.2.4.2 rmind } 125 1.1.1.2.4.2 rmind 126 1.1.1.2.4.2 rmind 127 1.1.1.2.4.2 rmind /******************************************************************************* 128 1.1.1.2.4.2 rmind * 129 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtMutexTerminate 130 1.1.1.2.4.2 rmind * 131 1.1.1.2.4.2 rmind * PARAMETERS: None. 132 1.1.1.2.4.2 rmind * 133 1.1.1.2.4.2 rmind * RETURN: None. 134 1.1.1.2.4.2 rmind * 135 1.1.1.2.4.2 rmind * DESCRIPTION: Delete all of the system mutex objects. This includes mutexes, 136 1.1.1.2.4.2 rmind * spin locks, and reader/writer locks. 137 1.1.1.2.4.2 rmind * 138 1.1.1.2.4.2 rmind ******************************************************************************/ 139 1.1.1.2.4.2 rmind 140 1.1.1.2.4.2 rmind void 141 1.1.1.2.4.2 rmind AcpiUtMutexTerminate ( 142 1.1.1.2.4.2 rmind void) 143 1.1.1.2.4.2 rmind { 144 1.1.1.2.4.2 rmind UINT32 i; 145 1.1.1.2.4.2 rmind 146 1.1.1.2.4.2 rmind 147 1.1.1.2.4.2 rmind ACPI_FUNCTION_TRACE (UtMutexTerminate); 148 1.1.1.2.4.2 rmind 149 1.1.1.2.4.2 rmind 150 1.1.1.2.4.2 rmind /* Delete each predefined mutex object */ 151 1.1.1.2.4.2 rmind 152 1.1.1.2.4.2 rmind for (i = 0; i < ACPI_NUM_MUTEX; i++) 153 1.1.1.2.4.2 rmind { 154 1.1.1.2.4.2 rmind AcpiUtDeleteMutex (i); 155 1.1.1.2.4.2 rmind } 156 1.1.1.2.4.2 rmind 157 1.1.1.2.4.2 rmind AcpiOsDeleteMutex (AcpiGbl_OsiMutex); 158 1.1.1.2.4.2 rmind 159 1.1.1.2.4.2 rmind /* Delete the spinlocks */ 160 1.1.1.2.4.2 rmind 161 1.1.1.2.4.2 rmind AcpiOsDeleteLock (AcpiGbl_GpeLock); 162 1.1.1.2.4.2 rmind AcpiOsDeleteLock (AcpiGbl_HardwareLock); 163 1.1.1.2.4.2 rmind 164 1.1.1.2.4.2 rmind /* Delete the reader/writer lock */ 165 1.1.1.2.4.2 rmind 166 1.1.1.2.4.2 rmind AcpiUtDeleteRwLock (&AcpiGbl_NamespaceRwLock); 167 1.1.1.2.4.2 rmind return_VOID; 168 1.1.1.2.4.2 rmind } 169 1.1.1.2.4.2 rmind 170 1.1.1.2.4.2 rmind 171 1.1.1.2.4.2 rmind /******************************************************************************* 172 1.1.1.2.4.2 rmind * 173 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtCreateMutex 174 1.1.1.2.4.2 rmind * 175 1.1.1.2.4.2 rmind * PARAMETERS: MutexID - ID of the mutex to be created 176 1.1.1.2.4.2 rmind * 177 1.1.1.2.4.2 rmind * RETURN: Status 178 1.1.1.2.4.2 rmind * 179 1.1.1.2.4.2 rmind * DESCRIPTION: Create a mutex object. 180 1.1.1.2.4.2 rmind * 181 1.1.1.2.4.2 rmind ******************************************************************************/ 182 1.1.1.2.4.2 rmind 183 1.1.1.2.4.2 rmind static ACPI_STATUS 184 1.1.1.2.4.2 rmind AcpiUtCreateMutex ( 185 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId) 186 1.1.1.2.4.2 rmind { 187 1.1.1.2.4.2 rmind ACPI_STATUS Status = AE_OK; 188 1.1.1.2.4.2 rmind 189 1.1.1.2.4.2 rmind 190 1.1.1.2.4.2 rmind ACPI_FUNCTION_TRACE_U32 (UtCreateMutex, MutexId); 191 1.1.1.2.4.2 rmind 192 1.1.1.2.4.2 rmind 193 1.1.1.2.4.2 rmind if (!AcpiGbl_MutexInfo[MutexId].Mutex) 194 1.1.1.2.4.2 rmind { 195 1.1.1.2.4.2 rmind Status = AcpiOsCreateMutex (&AcpiGbl_MutexInfo[MutexId].Mutex); 196 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 197 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].UseCount = 0; 198 1.1.1.2.4.2 rmind } 199 1.1.1.2.4.2 rmind 200 1.1.1.2.4.2 rmind return_ACPI_STATUS (Status); 201 1.1.1.2.4.2 rmind } 202 1.1.1.2.4.2 rmind 203 1.1.1.2.4.2 rmind 204 1.1.1.2.4.2 rmind /******************************************************************************* 205 1.1.1.2.4.2 rmind * 206 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtDeleteMutex 207 1.1.1.2.4.2 rmind * 208 1.1.1.2.4.2 rmind * PARAMETERS: MutexID - ID of the mutex to be deleted 209 1.1.1.2.4.2 rmind * 210 1.1.1.2.4.2 rmind * RETURN: Status 211 1.1.1.2.4.2 rmind * 212 1.1.1.2.4.2 rmind * DESCRIPTION: Delete a mutex object. 213 1.1.1.2.4.2 rmind * 214 1.1.1.2.4.2 rmind ******************************************************************************/ 215 1.1.1.2.4.2 rmind 216 1.1.1.2.4.2 rmind static void 217 1.1.1.2.4.2 rmind AcpiUtDeleteMutex ( 218 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId) 219 1.1.1.2.4.2 rmind { 220 1.1.1.2.4.2 rmind 221 1.1.1.2.4.2 rmind ACPI_FUNCTION_TRACE_U32 (UtDeleteMutex, MutexId); 222 1.1.1.2.4.2 rmind 223 1.1.1.2.4.2 rmind 224 1.1.1.2.4.2 rmind AcpiOsDeleteMutex (AcpiGbl_MutexInfo[MutexId].Mutex); 225 1.1.1.2.4.2 rmind 226 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].Mutex = NULL; 227 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 228 1.1.1.2.4.2 rmind } 229 1.1.1.2.4.2 rmind 230 1.1.1.2.4.2 rmind 231 1.1.1.2.4.2 rmind /******************************************************************************* 232 1.1.1.2.4.2 rmind * 233 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtAcquireMutex 234 1.1.1.2.4.2 rmind * 235 1.1.1.2.4.2 rmind * PARAMETERS: MutexID - ID of the mutex to be acquired 236 1.1.1.2.4.2 rmind * 237 1.1.1.2.4.2 rmind * RETURN: Status 238 1.1.1.2.4.2 rmind * 239 1.1.1.2.4.2 rmind * DESCRIPTION: Acquire a mutex object. 240 1.1.1.2.4.2 rmind * 241 1.1.1.2.4.2 rmind ******************************************************************************/ 242 1.1.1.2.4.2 rmind 243 1.1.1.2.4.2 rmind ACPI_STATUS 244 1.1.1.2.4.2 rmind AcpiUtAcquireMutex ( 245 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId) 246 1.1.1.2.4.2 rmind { 247 1.1.1.2.4.2 rmind ACPI_STATUS Status; 248 1.1.1.2.4.2 rmind ACPI_THREAD_ID ThisThreadId; 249 1.1.1.2.4.2 rmind 250 1.1.1.2.4.2 rmind 251 1.1.1.2.4.2 rmind ACPI_FUNCTION_NAME (UtAcquireMutex); 252 1.1.1.2.4.2 rmind 253 1.1.1.2.4.2 rmind 254 1.1.1.2.4.2 rmind if (MutexId > ACPI_MAX_MUTEX) 255 1.1.1.2.4.2 rmind { 256 1.1.1.2.4.2 rmind return (AE_BAD_PARAMETER); 257 1.1.1.2.4.2 rmind } 258 1.1.1.2.4.2 rmind 259 1.1.1.2.4.2 rmind ThisThreadId = AcpiOsGetThreadId (); 260 1.1.1.2.4.2 rmind 261 1.1.1.2.4.2 rmind #ifdef ACPI_MUTEX_DEBUG 262 1.1.1.2.4.2 rmind { 263 1.1.1.2.4.2 rmind UINT32 i; 264 1.1.1.2.4.2 rmind /* 265 1.1.1.2.4.2 rmind * Mutex debug code, for internal debugging only. 266 1.1.1.2.4.2 rmind * 267 1.1.1.2.4.2 rmind * Deadlock prevention. Check if this thread owns any mutexes of value 268 1.1.1.2.4.2 rmind * greater than or equal to this one. If so, the thread has violated 269 1.1.1.2.4.2 rmind * the mutex ordering rule. This indicates a coding error somewhere in 270 1.1.1.2.4.2 rmind * the ACPI subsystem code. 271 1.1.1.2.4.2 rmind */ 272 1.1.1.2.4.2 rmind for (i = MutexId; i < ACPI_NUM_MUTEX; i++) 273 1.1.1.2.4.2 rmind { 274 1.1.1.2.4.2 rmind if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId) 275 1.1.1.2.4.2 rmind { 276 1.1.1.2.4.2 rmind if (i == MutexId) 277 1.1.1.2.4.2 rmind { 278 1.1.1.2.4.2 rmind ACPI_ERROR ((AE_INFO, 279 1.1.1.2.4.2 rmind "Mutex [%s] already acquired by this thread [%u]", 280 1.1.1.2.4.2 rmind AcpiUtGetMutexName (MutexId), 281 1.1.1.2.4.2 rmind (UINT32) ThisThreadId)); 282 1.1.1.2.4.2 rmind 283 1.1.1.2.4.2 rmind return (AE_ALREADY_ACQUIRED); 284 1.1.1.2.4.2 rmind } 285 1.1.1.2.4.2 rmind 286 1.1.1.2.4.2 rmind ACPI_ERROR ((AE_INFO, 287 1.1.1.2.4.2 rmind "Invalid acquire order: Thread %u owns [%s], wants [%s]", 288 1.1.1.2.4.2 rmind (UINT32) ThisThreadId, AcpiUtGetMutexName (i), 289 1.1.1.2.4.2 rmind AcpiUtGetMutexName (MutexId))); 290 1.1.1.2.4.2 rmind 291 1.1.1.2.4.2 rmind return (AE_ACQUIRE_DEADLOCK); 292 1.1.1.2.4.2 rmind } 293 1.1.1.2.4.2 rmind } 294 1.1.1.2.4.2 rmind } 295 1.1.1.2.4.2 rmind #endif 296 1.1.1.2.4.2 rmind 297 1.1.1.2.4.2 rmind ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, 298 1.1.1.2.4.2 rmind "Thread %u attempting to acquire Mutex [%s]\n", 299 1.1.1.2.4.2 rmind (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); 300 1.1.1.2.4.2 rmind 301 1.1.1.2.4.2 rmind Status = AcpiOsAcquireMutex (AcpiGbl_MutexInfo[MutexId].Mutex, 302 1.1.1.2.4.2 rmind ACPI_WAIT_FOREVER); 303 1.1.1.2.4.2 rmind if (ACPI_SUCCESS (Status)) 304 1.1.1.2.4.2 rmind { 305 1.1.1.2.4.2 rmind ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u acquired Mutex [%s]\n", 306 1.1.1.2.4.2 rmind (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); 307 1.1.1.2.4.2 rmind 308 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].UseCount++; 309 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].ThreadId = ThisThreadId; 310 1.1.1.2.4.2 rmind } 311 1.1.1.2.4.2 rmind else 312 1.1.1.2.4.2 rmind { 313 1.1.1.2.4.2 rmind ACPI_EXCEPTION ((AE_INFO, Status, 314 1.1.1.2.4.2 rmind "Thread %u could not acquire Mutex [0x%X]", 315 1.1.1.2.4.2 rmind (UINT32) ThisThreadId, MutexId)); 316 1.1.1.2.4.2 rmind } 317 1.1.1.2.4.2 rmind 318 1.1.1.2.4.2 rmind return (Status); 319 1.1.1.2.4.2 rmind } 320 1.1.1.2.4.2 rmind 321 1.1.1.2.4.2 rmind 322 1.1.1.2.4.2 rmind /******************************************************************************* 323 1.1.1.2.4.2 rmind * 324 1.1.1.2.4.2 rmind * FUNCTION: AcpiUtReleaseMutex 325 1.1.1.2.4.2 rmind * 326 1.1.1.2.4.2 rmind * PARAMETERS: MutexID - ID of the mutex to be released 327 1.1.1.2.4.2 rmind * 328 1.1.1.2.4.2 rmind * RETURN: Status 329 1.1.1.2.4.2 rmind * 330 1.1.1.2.4.2 rmind * DESCRIPTION: Release a mutex object. 331 1.1.1.2.4.2 rmind * 332 1.1.1.2.4.2 rmind ******************************************************************************/ 333 1.1.1.2.4.2 rmind 334 1.1.1.2.4.2 rmind ACPI_STATUS 335 1.1.1.2.4.2 rmind AcpiUtReleaseMutex ( 336 1.1.1.2.4.2 rmind ACPI_MUTEX_HANDLE MutexId) 337 1.1.1.2.4.2 rmind { 338 1.1.1.2.4.2 rmind ACPI_THREAD_ID ThisThreadId; 339 1.1.1.2.4.2 rmind 340 1.1.1.2.4.2 rmind 341 1.1.1.2.4.2 rmind ACPI_FUNCTION_NAME (UtReleaseMutex); 342 1.1.1.2.4.2 rmind 343 1.1.1.2.4.2 rmind 344 1.1.1.2.4.2 rmind ThisThreadId = AcpiOsGetThreadId (); 345 1.1.1.2.4.2 rmind ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u releasing Mutex [%s]\n", 346 1.1.1.2.4.2 rmind (UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId))); 347 1.1.1.2.4.2 rmind 348 1.1.1.2.4.2 rmind if (MutexId > ACPI_MAX_MUTEX) 349 1.1.1.2.4.2 rmind { 350 1.1.1.2.4.2 rmind return (AE_BAD_PARAMETER); 351 1.1.1.2.4.2 rmind } 352 1.1.1.2.4.2 rmind 353 1.1.1.2.4.2 rmind /* 354 1.1.1.2.4.2 rmind * Mutex must be acquired in order to release it! 355 1.1.1.2.4.2 rmind */ 356 1.1.1.2.4.2 rmind if (AcpiGbl_MutexInfo[MutexId].ThreadId == ACPI_MUTEX_NOT_ACQUIRED) 357 1.1.1.2.4.2 rmind { 358 1.1.1.2.4.2 rmind ACPI_ERROR ((AE_INFO, 359 1.1.1.2.4.2 rmind "Mutex [0x%X] is not acquired, cannot release", MutexId)); 360 1.1.1.2.4.2 rmind 361 1.1.1.2.4.2 rmind return (AE_NOT_ACQUIRED); 362 1.1.1.2.4.2 rmind } 363 1.1.1.2.4.2 rmind 364 1.1.1.2.4.2 rmind #ifdef ACPI_MUTEX_DEBUG 365 1.1.1.2.4.2 rmind { 366 1.1.1.2.4.2 rmind UINT32 i; 367 1.1.1.2.4.2 rmind /* 368 1.1.1.2.4.2 rmind * Mutex debug code, for internal debugging only. 369 1.1.1.2.4.2 rmind * 370 1.1.1.2.4.2 rmind * Deadlock prevention. Check if this thread owns any mutexes of value 371 1.1.1.2.4.2 rmind * greater than this one. If so, the thread has violated the mutex 372 1.1.1.2.4.2 rmind * ordering rule. This indicates a coding error somewhere in 373 1.1.1.2.4.2 rmind * the ACPI subsystem code. 374 1.1.1.2.4.2 rmind */ 375 1.1.1.2.4.2 rmind for (i = MutexId; i < ACPI_NUM_MUTEX; i++) 376 1.1.1.2.4.2 rmind { 377 1.1.1.2.4.2 rmind if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId) 378 1.1.1.2.4.2 rmind { 379 1.1.1.2.4.2 rmind if (i == MutexId) 380 1.1.1.2.4.2 rmind { 381 1.1.1.2.4.2 rmind continue; 382 1.1.1.2.4.2 rmind } 383 1.1.1.2.4.2 rmind 384 1.1.1.2.4.2 rmind ACPI_ERROR ((AE_INFO, 385 1.1.1.2.4.2 rmind "Invalid release order: owns [%s], releasing [%s]", 386 1.1.1.2.4.2 rmind AcpiUtGetMutexName (i), AcpiUtGetMutexName (MutexId))); 387 1.1.1.2.4.2 rmind 388 1.1.1.2.4.2 rmind return (AE_RELEASE_DEADLOCK); 389 1.1.1.2.4.2 rmind } 390 1.1.1.2.4.2 rmind } 391 1.1.1.2.4.2 rmind } 392 1.1.1.2.4.2 rmind #endif 393 1.1.1.2.4.2 rmind 394 1.1.1.2.4.2 rmind /* Mark unlocked FIRST */ 395 1.1.1.2.4.2 rmind 396 1.1.1.2.4.2 rmind AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED; 397 1.1.1.2.4.2 rmind 398 1.1.1.2.4.2 rmind AcpiOsReleaseMutex (AcpiGbl_MutexInfo[MutexId].Mutex); 399 1.1.1.2.4.2 rmind return (AE_OK); 400 1.1.1.2.4.2 rmind } 401 1.1.1.2.4.2 rmind 402 1.1.1.2.4.2 rmind 403
Indexes created Thu Oct 02 10:09:58 GMT 2025