mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-14 03:30:17 +01:00
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/* 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/. */
|
|
/*
|
|
* Locking and queue management primatives
|
|
*
|
|
*/
|
|
|
|
#include "seccomon.h"
|
|
#include "nssilock.h"
|
|
#include "secmod.h"
|
|
#include "secmodi.h"
|
|
#include "secmodti.h"
|
|
#include "nssrwlk.h"
|
|
|
|
/*
|
|
* create a new lock for a Module List
|
|
*/
|
|
SECMODListLock *SECMOD_NewListLock()
|
|
{
|
|
return NSSRWLock_New( 10, "moduleListLock");
|
|
}
|
|
|
|
/*
|
|
* destroy the lock
|
|
*/
|
|
void SECMOD_DestroyListLock(SECMODListLock *lock)
|
|
{
|
|
NSSRWLock_Destroy(lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* Lock the List for Read: NOTE: this assumes the reading isn't so common
|
|
* the writing will be starved.
|
|
*/
|
|
void SECMOD_GetReadLock(SECMODListLock *modLock)
|
|
{
|
|
NSSRWLock_LockRead(modLock);
|
|
}
|
|
|
|
/*
|
|
* Release the Read lock
|
|
*/
|
|
void SECMOD_ReleaseReadLock(SECMODListLock *modLock)
|
|
{
|
|
NSSRWLock_UnlockRead(modLock);
|
|
}
|
|
|
|
|
|
/*
|
|
* lock the list for Write
|
|
*/
|
|
void SECMOD_GetWriteLock(SECMODListLock *modLock)
|
|
{
|
|
NSSRWLock_LockWrite(modLock);
|
|
}
|
|
|
|
|
|
/*
|
|
* Release the Write Lock: NOTE, this code is pretty inefficient if you have
|
|
* lots of write collisions.
|
|
*/
|
|
void SECMOD_ReleaseWriteLock(SECMODListLock *modLock)
|
|
{
|
|
NSSRWLock_UnlockWrite(modLock);
|
|
}
|
|
|
|
|
|
/*
|
|
* must Hold the Write lock
|
|
*/
|
|
void
|
|
SECMOD_RemoveList(SECMODModuleList **parent, SECMODModuleList *child)
|
|
{
|
|
*parent = child->next;
|
|
child->next = NULL;
|
|
}
|
|
|
|
/*
|
|
* if lock is not specified, it must already be held
|
|
*/
|
|
void
|
|
SECMOD_AddList(SECMODModuleList *parent, SECMODModuleList *child,
|
|
SECMODListLock *lock)
|
|
{
|
|
if (lock) { SECMOD_GetWriteLock(lock); }
|
|
|
|
child->next = parent->next;
|
|
parent->next = child;
|
|
|
|
if (lock) { SECMOD_ReleaseWriteLock(lock); }
|
|
}
|
|
|
|
|