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(Logical change 1.44)
git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@126 fd59a12c-fef9-0310-b244-a6a79926bd2f
This commit is contained in:
Steven Dake
parent
13180ca19b
commit
f6c12e54d9
153
exec/hdb.c
153
exec/hdb.c
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/*
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* Copyright (c) 2002-2004 MontaVista Software, Inc.
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*
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* All rights reserved.
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*
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* Author: Steven Dake (sdake@mvista.com)
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*
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* This software licensed under BSD license, the text of which follows:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the MontaVista Software, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "hdb.h"
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enum SA_HANDLE_STATE {
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SA_HANDLE_STATE_EMPTY,
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SA_HANDLE_STATE_PENDINGREMOVAL,
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SA_HANDLE_STATE_ACTIVE
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};
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struct saHandle {
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int state;
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void *instance;
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int refCount;
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};
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SaErrorT
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saHandleCreate (
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struct saHandleDatabase *handleDatabase,
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int instanceSize,
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unsigned int *handleOut)
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{
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int handle;
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void *newHandles;
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int found = 0;
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void *instance;
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for (handle = 0; handle < handleDatabase->handleCount; handle++) {
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if (handleDatabase->handles[handle].state == SA_HANDLE_STATE_EMPTY) {
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found = 1;
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break;
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}
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}
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if (found == 0) {
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handleDatabase->handleCount += 1;
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newHandles = (struct saHandle *)realloc (handleDatabase->handles,
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sizeof (struct saHandle) * handleDatabase->handleCount);
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if (newHandles == 0) {
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return (SA_ERR_NO_MEMORY);
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}
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handleDatabase->handles = newHandles;
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}
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instance = malloc (instanceSize);
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if (instance == 0) {
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return (SA_ERR_NO_MEMORY);
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}
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memset (instance, 0, instanceSize);
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handleDatabase->handles[handle].state = SA_HANDLE_STATE_ACTIVE;
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handleDatabase->handles[handle].instance = instance;
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handleDatabase->handles[handle].refCount = 1;
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*handleOut = handle;
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return (SA_OK);
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}
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SaErrorT
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saHandleDestroy (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle)
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{
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handleDatabase->handles[handle].state = SA_HANDLE_STATE_PENDINGREMOVAL;
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saHandleInstancePut (handleDatabase, handle);
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return (SA_OK);
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}
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SaErrorT
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saHandleInstanceGet (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle,
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void **instance)
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{
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if (handle > handleDatabase->handleCount) {
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return (SA_ERR_BAD_HANDLE);
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}
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if (handleDatabase->handles[handle].state != SA_HANDLE_STATE_ACTIVE) {
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return (SA_ERR_BAD_HANDLE);
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}
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*instance = handleDatabase->handles[handle].instance;
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handleDatabase->handles[handle].refCount += 1;
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return (SA_OK);
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}
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SaErrorT
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saHandleInstancePut (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle)
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{
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void *instance;
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handleDatabase->handles[handle].refCount -= 1;
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assert (handleDatabase->handles[handle].refCount >= 0);
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if (handleDatabase->handles[handle].refCount == 0) {
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instance = (handleDatabase->handles[handle].instance);
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if (handleDatabase->handleInstanceDestructor) {
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handleDatabase->handleInstanceDestructor (instance);
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}
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free (instance);
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memset (&handleDatabase->handles[handle], 0, sizeof (struct saHandle));
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}
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return (SA_OK);
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}
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69
exec/hdb.h
69
exec/hdb.h
@ -0,0 +1,69 @@
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/*
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* Copyright (c) 2002-2004 MontaVista Software, Inc.
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*
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* All rights reserved.
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*
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* Author: Steven Dake (sdake@mvista.com)
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*
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* This software licensed under BSD license, the text of which follows:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the MontaVista Software, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef HDB_H_DEFINED
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#define HDB_H_DEFINED
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#include "../include/ais_types.h"
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struct saHandleDatabase {
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unsigned int handleCount;
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struct saHandle *handles;
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pthread_mutex_t mutex;
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void (*handleInstanceDestructor) (void *);
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};
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extern SaErrorT
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saHandleCreate (
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struct saHandleDatabase *handleDatabase,
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int instanceSize,
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unsigned int *handleOut);
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extern SaErrorT
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saHandleDestroy (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle);
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extern SaErrorT
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saHandleInstanceGet (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle,
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void **instance);
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extern SaErrorT
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saHandleInstancePut (
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struct saHandleDatabase *handleDatabase,
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unsigned int handle);
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#endif /* HDB_H_DEFINED */
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