*****************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGES.
*/
-
#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_EXECUTER
- ACPI_MODULE_NAME ("exmutex")
+ACPI_MODULE_NAME("exmutex")
+/* Local prototypes */
+static void
+acpi_ex_link_mutex(union acpi_operand_object *obj_desc,
+ struct acpi_thread_state *thread);
/*******************************************************************************
*
*
* PARAMETERS: obj_desc - The mutex to be unlinked
*
- * RETURN: Status
+ * RETURN: None
*
* DESCRIPTION: Remove a mutex from the "acquired_mutex" list
*
******************************************************************************/
-void
-acpi_ex_unlink_mutex (
- union acpi_operand_object *obj_desc)
+void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc)
{
- struct acpi_thread_state *thread = obj_desc->mutex.owner_thread;
-
+ struct acpi_thread_state *thread = obj_desc->mutex.owner_thread;
if (!thread) {
return;
if (obj_desc->mutex.prev) {
(obj_desc->mutex.prev)->mutex.next = obj_desc->mutex.next;
- }
- else {
+ } else {
thread->acquired_mutex_list = obj_desc->mutex.next;
}
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_link_mutex
*
- * PARAMETERS: obj_desc - The mutex to be linked
- * list_head - head of the "acquired_mutex" list
+ * PARAMETERS: obj_desc - The mutex to be linked
+ * Thread - Current executing thread object
*
- * RETURN: Status
+ * RETURN: None
*
* DESCRIPTION: Add a mutex to the "acquired_mutex" list for this walk
*
******************************************************************************/
-void
-acpi_ex_link_mutex (
- union acpi_operand_object *obj_desc,
- struct acpi_thread_state *thread)
+static void
+acpi_ex_link_mutex(union acpi_operand_object *obj_desc,
+ struct acpi_thread_state *thread)
{
- union acpi_operand_object *list_head;
-
+ union acpi_operand_object *list_head;
list_head = thread->acquired_mutex_list;
thread->acquired_mutex_list = obj_desc;
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_acquire_mutex
*
- * PARAMETERS: time_desc - The 'time to delay' object descriptor
- * obj_desc - The object descriptor for this op
+ * PARAMETERS: time_desc - Timeout integer
+ * obj_desc - Mutex object
+ * walk_state - Current method execution state
*
* RETURN: Status
*
******************************************************************************/
acpi_status
-acpi_ex_acquire_mutex (
- union acpi_operand_object *time_desc,
- union acpi_operand_object *obj_desc,
- struct acpi_walk_state *walk_state)
+acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
+ union acpi_operand_object *obj_desc,
+ struct acpi_walk_state *walk_state)
{
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE_PTR ("ex_acquire_mutex", obj_desc);
+ acpi_status status;
+ ACPI_FUNCTION_TRACE_PTR("ex_acquire_mutex", obj_desc);
if (!obj_desc) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Sanity check -- we must have a valid thread ID */
if (!walk_state->thread) {
- ACPI_REPORT_ERROR (("Cannot acquire Mutex [%4.4s], null thread info\n",
- acpi_ut_get_node_name (obj_desc->mutex.node)));
- return_ACPI_STATUS (AE_AML_INTERNAL);
+ ACPI_ERROR((AE_INFO,
+ "Cannot acquire Mutex [%4.4s], null thread info",
+ acpi_ut_get_node_name(obj_desc->mutex.node)));
+ return_ACPI_STATUS(AE_AML_INTERNAL);
}
/*
* mutex. This mechanism provides some deadlock prevention
*/
if (walk_state->thread->current_sync_level > obj_desc->mutex.sync_level) {
- ACPI_REPORT_ERROR (("Cannot acquire Mutex [%4.4s], incorrect sync_level\n",
- acpi_ut_get_node_name (obj_desc->mutex.node)));
- return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
+ ACPI_ERROR((AE_INFO,
+ "Cannot acquire Mutex [%4.4s], incorrect sync_level",
+ acpi_ut_get_node_name(obj_desc->mutex.node)));
+ return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
}
/* Support for multiple acquires by the owning thread */
if (obj_desc->mutex.owner_thread) {
/* Special case for Global Lock, allow all threads */
- if ((obj_desc->mutex.owner_thread->thread_id == walk_state->thread->thread_id) ||
- (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore)) {
+ if ((obj_desc->mutex.owner_thread->thread_id ==
+ walk_state->thread->thread_id) ||
+ (obj_desc->mutex.semaphore ==
+ acpi_gbl_global_lock_semaphore)) {
/*
* The mutex is already owned by this thread,
* just increment the acquisition depth
*/
obj_desc->mutex.acquisition_depth++;
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
}
/* Acquire the mutex, wait if necessary */
- status = acpi_ex_system_acquire_mutex (time_desc, obj_desc);
- if (ACPI_FAILURE (status)) {
+ status = acpi_ex_system_acquire_mutex(time_desc, obj_desc);
+ if (ACPI_FAILURE(status)) {
/* Includes failure from a timeout on time_desc */
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
/* Have the mutex: update mutex and walk info and save the sync_level */
- obj_desc->mutex.owner_thread = walk_state->thread;
+ obj_desc->mutex.owner_thread = walk_state->thread;
obj_desc->mutex.acquisition_depth = 1;
- obj_desc->mutex.original_sync_level = walk_state->thread->current_sync_level;
+ obj_desc->mutex.original_sync_level =
+ walk_state->thread->current_sync_level;
walk_state->thread->current_sync_level = obj_desc->mutex.sync_level;
/* Link the mutex to the current thread for force-unlock at method exit */
- acpi_ex_link_mutex (obj_desc, walk_state->thread);
+ acpi_ex_link_mutex(obj_desc, walk_state->thread);
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_release_mutex
*
* PARAMETERS: obj_desc - The object descriptor for this op
+ * walk_state - Current method execution state
*
* RETURN: Status
*
******************************************************************************/
acpi_status
-acpi_ex_release_mutex (
- union acpi_operand_object *obj_desc,
- struct acpi_walk_state *walk_state)
+acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
+ struct acpi_walk_state *walk_state)
{
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE ("ex_release_mutex");
+ acpi_status status;
+ ACPI_FUNCTION_TRACE("ex_release_mutex");
if (!obj_desc) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* The mutex must have been previously acquired in order to release it */
if (!obj_desc->mutex.owner_thread) {
- ACPI_REPORT_ERROR (("Cannot release Mutex [%4.4s], not acquired\n",
- acpi_ut_get_node_name (obj_desc->mutex.node)));
- return_ACPI_STATUS (AE_AML_MUTEX_NOT_ACQUIRED);
+ ACPI_ERROR((AE_INFO,
+ "Cannot release Mutex [%4.4s], not acquired",
+ acpi_ut_get_node_name(obj_desc->mutex.node)));
+ return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED);
}
/* Sanity check -- we must have a valid thread ID */
if (!walk_state->thread) {
- ACPI_REPORT_ERROR (("Cannot release Mutex [%4.4s], null thread info\n",
- acpi_ut_get_node_name (obj_desc->mutex.node)));
- return_ACPI_STATUS (AE_AML_INTERNAL);
+ ACPI_ERROR((AE_INFO,
+ "Cannot release Mutex [%4.4s], null thread info",
+ acpi_ut_get_node_name(obj_desc->mutex.node)));
+ return_ACPI_STATUS(AE_AML_INTERNAL);
}
/*
* The Mutex is owned, but this thread must be the owner.
* Special case for Global Lock, any thread can release
*/
- if ((obj_desc->mutex.owner_thread->thread_id != walk_state->thread->thread_id) &&
- (obj_desc->mutex.semaphore != acpi_gbl_global_lock_semaphore)) {
- ACPI_REPORT_ERROR ((
- "Thread %X cannot release Mutex [%4.4s] acquired by thread %X\n",
- walk_state->thread->thread_id,
- acpi_ut_get_node_name (obj_desc->mutex.node),
- obj_desc->mutex.owner_thread->thread_id));
- return_ACPI_STATUS (AE_AML_NOT_OWNER);
+ if ((obj_desc->mutex.owner_thread->thread_id !=
+ walk_state->thread->thread_id)
+ && (obj_desc->mutex.semaphore != acpi_gbl_global_lock_semaphore)) {
+ ACPI_ERROR((AE_INFO,
+ "Thread %X cannot release Mutex [%4.4s] acquired by thread %X",
+ walk_state->thread->thread_id,
+ acpi_ut_get_node_name(obj_desc->mutex.node),
+ obj_desc->mutex.owner_thread->thread_id));
+ return_ACPI_STATUS(AE_AML_NOT_OWNER);
}
/*
* equal to the current sync level
*/
if (obj_desc->mutex.sync_level > walk_state->thread->current_sync_level) {
- ACPI_REPORT_ERROR (("Cannot release Mutex [%4.4s], incorrect sync_level\n",
- acpi_ut_get_node_name (obj_desc->mutex.node)));
- return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
+ ACPI_ERROR((AE_INFO,
+ "Cannot release Mutex [%4.4s], incorrect sync_level",
+ acpi_ut_get_node_name(obj_desc->mutex.node)));
+ return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
}
/* Match multiple Acquires with multiple Releases */
if (obj_desc->mutex.acquisition_depth != 0) {
/* Just decrement the depth and return */
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
/* Unlink the mutex from the owner's list */
- acpi_ex_unlink_mutex (obj_desc);
+ acpi_ex_unlink_mutex(obj_desc);
/* Release the mutex */
- status = acpi_ex_system_release_mutex (obj_desc);
+ status = acpi_ex_system_release_mutex(obj_desc);
/* Update the mutex and walk state, restore sync_level before acquire */
obj_desc->mutex.owner_thread = NULL;
- walk_state->thread->current_sync_level = obj_desc->mutex.original_sync_level;
+ walk_state->thread->current_sync_level =
+ obj_desc->mutex.original_sync_level;
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_release_all_mutexes
*
- * PARAMETERS: mutex_list - Head of the mutex list
+ * PARAMETERS: Thread - Current executing thread object
*
* RETURN: Status
*
- * DESCRIPTION: Release all mutexes in the list
+ * DESCRIPTION: Release all mutexes held by this thread
*
******************************************************************************/
-void
-acpi_ex_release_all_mutexes (
- struct acpi_thread_state *thread)
+void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
{
- union acpi_operand_object *next = thread->acquired_mutex_list;
- union acpi_operand_object *this;
- acpi_status status;
-
-
- ACPI_FUNCTION_ENTRY ();
+ union acpi_operand_object *next = thread->acquired_mutex_list;
+ union acpi_operand_object *this;
+ acpi_status status;
+ ACPI_FUNCTION_ENTRY();
/* Traverse the list of owned mutexes, releasing each one */
next = this->mutex.next;
this->mutex.acquisition_depth = 1;
- this->mutex.prev = NULL;
- this->mutex.next = NULL;
+ this->mutex.prev = NULL;
+ this->mutex.next = NULL;
- /* Release the mutex */
+ /* Release the mutex */
- status = acpi_ex_system_release_mutex (this);
- if (ACPI_FAILURE (status)) {
+ status = acpi_ex_system_release_mutex(this);
+ if (ACPI_FAILURE(status)) {
continue;
}
thread->current_sync_level = this->mutex.original_sync_level;
}
}
-
-
git://git.onelab.eu / linux-2.6.git / blobdiff