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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* pkix_pl_mutex.c
*
* Mutual Exclusion (Lock) Object Functions
*
*/
#include "pkix_pl_mutex.h"
/* --Private-Functions-------------------------------------------- */
/*
* FUNCTION: pkix_pl_Mutex_Destroy
* (see comments for PKIX_PL_DestructorCallback in pkix_pl_system.h)
*/
static PKIX_Error *
pkix_pl_Mutex_Destroy(
PKIX_PL_Object *object,
void *plContext)
{
PKIX_PL_Mutex *mutex = NULL;
PKIX_ENTER(MUTEX, "pkix_pl_Mutex_Destroy");
PKIX_NULLCHECK_ONE(object);
/* Sanity check: Test that "object" is a mutex */
PKIX_CHECK(pkix_CheckType(object, PKIX_MUTEX_TYPE, plContext),
PKIX_OBJECTNOTMUTEX);
mutex = (PKIX_PL_Mutex*) object;
PKIX_MUTEX_DEBUG("\tCalling PR_DestroyLock).\n");
PR_DestroyLock(mutex->lock);
mutex->lock = NULL;
cleanup:
PKIX_RETURN(MUTEX);
}
/*
* FUNCTION: pkix_pl_Mutex_RegisterSelf
* DESCRIPTION:
* Registers PKIX_MUTEX_TYPE and its related functions with systemClasses[]
* THREAD SAFETY:
* Not Thread Safe - for performance and complexity reasons
*
* Since this function is only called by PKIX_PL_Initialize, which should
* only be called once, it is acceptable that this function is not
* thread-safe.
*/
PKIX_Error *
pkix_pl_Mutex_RegisterSelf(
/* ARGSUSED */ void *plContext)
{
extern pkix_ClassTable_Entry systemClasses[PKIX_NUMTYPES];
pkix_ClassTable_Entry entry;
PKIX_ENTER(MUTEX, "pkix_pl_Mutex_RegisterSelf");
entry.description = "Mutex";
entry.objCounter = 0;
entry.typeObjectSize = sizeof(PKIX_PL_Mutex);
entry.destructor = pkix_pl_Mutex_Destroy;
entry.equalsFunction = NULL;
entry.hashcodeFunction = NULL;
entry.toStringFunction = NULL;
entry.comparator = NULL;
entry.duplicateFunction = NULL;
systemClasses[PKIX_MUTEX_TYPE] = entry;
PKIX_RETURN(MUTEX);
}
/* --Public-Functions--------------------------------------------- */
/*
* FUNCTION: PKIX_PL_Mutex_Create (see comments in pkix_pl_system.h)
*/
PKIX_Error *
PKIX_PL_Mutex_Create(
PKIX_PL_Mutex **pNewLock,
void *plContext)
{
PKIX_PL_Mutex *mutex = NULL;
PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Create");
PKIX_NULLCHECK_ONE(pNewLock);
PKIX_CHECK(PKIX_PL_Object_Alloc
(PKIX_MUTEX_TYPE,
sizeof (PKIX_PL_Mutex),
(PKIX_PL_Object **)&mutex,
plContext),
PKIX_COULDNOTCREATELOCKOBJECT);
PKIX_MUTEX_DEBUG("\tCalling PR_NewLock).\n");
mutex->lock = PR_NewLock();
/* If an error occurred in NSPR, report it here */
if (mutex->lock == NULL) {
PKIX_DECREF(mutex);
PKIX_ERROR_ALLOC_ERROR();
}
*pNewLock = mutex;
cleanup:
PKIX_RETURN(MUTEX);
}
/*
* FUNCTION: PKIX_PL_Mutex_Lock (see comments in pkix_pl_system.h)
*/
PKIX_Error *
PKIX_PL_Mutex_Lock(
PKIX_PL_Mutex *mutex,
void *plContext)
{
PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Lock");
PKIX_NULLCHECK_ONE(mutex);
PKIX_MUTEX_DEBUG("\tCalling PR_Lock).\n");
PR_Lock(mutex->lock);
PKIX_MUTEX_DEBUG_ARG("(Thread %u just acquired the lock)\n",
(PKIX_UInt32)PR_GetCurrentThread());
PKIX_RETURN(MUTEX);
}
/*
* FUNCTION: PKIX_PL_Mutex_Unlock (see comments in pkix_pl_system.h)
*/
PKIX_Error *
PKIX_PL_Mutex_Unlock(
PKIX_PL_Mutex *mutex,
void *plContext)
{
PRStatus result;
PKIX_ENTER(MUTEX, "PKIX_PL_Mutex_Unlock");
PKIX_NULLCHECK_ONE(mutex);
PKIX_MUTEX_DEBUG("\tCalling PR_Unlock).\n");
result = PR_Unlock(mutex->lock);
PKIX_MUTEX_DEBUG_ARG("(Thread %u just released the lock)\n",
(PKIX_UInt32)PR_GetCurrentThread());
if (result == PR_FAILURE) {
PKIX_ERROR_FATAL(PKIX_ERRORUNLOCKINGMUTEX);
}
cleanup:
PKIX_RETURN(MUTEX);
}
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