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/*
* Copyright 2006 Serge van den Boom <svdb@stack.nl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define NETDESCRIPTOR_INTERNAL
#include "ndesc.h"
#include "netmanager.h"
#include "libs/callback.h"
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#undef DEBUG_NETDESCRIPTOR_REF
#ifdef DEBUG_NETDESCRIPTOR_REF
# include "libs/log.h"
# include <inttypes.h>
#endif
static NetDescriptor *
NetDescriptor_alloc(void) {
return malloc(sizeof (NetDescriptor));
}
static void
NetDescriptor_free(NetDescriptor *nd) {
free(nd);
}
// Sets the ref count to 1.
NetDescriptor *
NetDescriptor_new(Socket *socket, void *extra) {
NetDescriptor *nd;
nd = NetDescriptor_alloc();
nd->refCount = 1;
#ifdef DEBUG_NETDESCRIPTOR_REF
log_add(log_Debug, "NetDescriptor %08" PRIxPTR ": ref=1 (%d)",
(uintptr_t) nd, nd->refCount);
#endif
nd->flags.closed = false;
nd->readCallback = NULL;
nd->writeCallback = NULL;
nd->exceptionCallback = NULL;
nd->closeCallback = NULL;
nd->socket = socket;
nd->smd = NULL;
nd->extra = extra;
if (NetManager_addDesc(nd) == -1) {
int savedErrno = errno;
NetDescriptor_free(nd);
errno = savedErrno;
return NULL;
}
return nd;
}
static void
NetDescriptor_delete(NetDescriptor *nd) {
assert(nd->socket == Socket_noSocket);
assert(nd->smd == NULL);
NetDescriptor_free(nd);
}
// Called from the callback handler.
static void
NetDescriptor_closeCallback(NetDescriptor *nd) {
if (nd->closeCallback != NULL) {
// The check is necessary because the close callback may have
// been removed before it is triggered.
(*nd->closeCallback)(nd);
}
NetDescriptor_decRef(nd);
}
void
NetDescriptor_close(NetDescriptor *nd) {
assert(!nd->flags.closed);
assert(nd->socket != Socket_noSocket);
NetManager_removeDesc(nd);
(void) Socket_close(nd->socket);
nd->socket = Socket_noSocket;
nd->flags.closed = true;
if (nd->closeCallback != NULL) {
// Keep one reference around until the close callback has been
// called.
(void) Callback_add(
(CallbackFunction) NetDescriptor_closeCallback,
(CallbackArg) nd);
} else
NetDescriptor_decRef(nd);
}
void
NetDescriptor_incRef(NetDescriptor *nd) {
assert(nd->refCount < REFCOUNT_MAX);
nd->refCount++;
#ifdef DEBUG_NETDESCRIPTOR_REF
log_add(log_Debug, "NetDescriptor %08" PRIxPTR ": ref++ (%d)",
(uintptr_t) nd, nd->refCount);
#endif
}
// returns true iff the ref counter has reached 0.
bool
NetDescriptor_decRef(NetDescriptor *nd) {
assert(nd->refCount > 0);
nd->refCount--;
#ifdef DEBUG_NETDESCRIPTOR_REF
log_add(log_Debug, "NetDescriptor %08" PRIxPTR ": ref-- (%d)",
(uintptr_t) nd, nd->refCount);
#endif
if (nd->refCount == 0) {
NetDescriptor_delete(nd);
return true;
}
return false;
}
// The socket will no longer be managed by the NetManager.
void
NetDescriptor_detach(NetDescriptor *nd) {
NetManager_removeDesc(nd);
nd->socket = Socket_noSocket;
nd->flags.closed = true;
NetDescriptor_decRef(nd);
}
Socket *
NetDescriptor_getSocket(NetDescriptor *nd) {
return nd->socket;
}
void
NetDescriptor_setExtra(NetDescriptor *nd, void *extra) {
nd->extra = extra;
}
void *
NetDescriptor_getExtra(const NetDescriptor *nd) {
return nd->extra;
}
void
NetDescriptor_setReadCallback(NetDescriptor *nd,
NetDescriptor_ReadCallback callback) {
nd->readCallback = callback;
if (!nd->flags.closed) {
if (nd->readCallback != NULL) {
NetManager_activateReadCallback(nd);
} else
NetManager_deactivateReadCallback(nd);
}
}
void
NetDescriptor_setWriteCallback(NetDescriptor *nd,
NetDescriptor_WriteCallback callback) {
nd->writeCallback = callback;
if (!nd->flags.closed) {
if (nd->writeCallback != NULL) {
NetManager_activateWriteCallback(nd);
} else
NetManager_deactivateWriteCallback(nd);
}
}
void
NetDescriptor_setExceptionCallback(NetDescriptor *nd,
NetDescriptor_ExceptionCallback callback) {
nd->exceptionCallback = callback;
if (!nd->flags.closed) {
if (nd->exceptionCallback != NULL) {
NetManager_activateExceptionCallback(nd);
} else
NetManager_deactivateExceptionCallback(nd);
}
}
// The close callback is called as a result of a socket being closed, either
// because of a local command or a remote disconnect.
// The close callback will only be scheduled when this happens. The
// callback will not be called until the Callback_process() is called.
void
NetDescriptor_setCloseCallback(NetDescriptor *nd,
NetDescriptor_CloseCallback callback) {
nd->closeCallback = callback;
}
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