tor-android/external/badvpn_dns/base/BPending.c

206 lines
5.2 KiB
C

/**
* @file BPending.c
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stddef.h>
#include <misc/debug.h>
#include <misc/offset.h>
#include "BPending.h"
#include "BPending_list.h"
#include <structure/SLinkedList_impl.h>
void BPendingGroup_Init (BPendingGroup *g)
{
// init jobs list
BPending__List_Init(&g->jobs);
// init pending counter
DebugCounter_Init(&g->pending_ctr);
// init debug object
DebugObject_Init(&g->d_obj);
}
void BPendingGroup_Free (BPendingGroup *g)
{
DebugCounter_Free(&g->pending_ctr);
ASSERT(BPending__List_IsEmpty(&g->jobs))
DebugObject_Free(&g->d_obj);
}
int BPendingGroup_HasJobs (BPendingGroup *g)
{
DebugObject_Access(&g->d_obj);
return !BPending__List_IsEmpty(&g->jobs);
}
void BPendingGroup_ExecuteJob (BPendingGroup *g)
{
ASSERT(!BPending__List_IsEmpty(&g->jobs))
DebugObject_Access(&g->d_obj);
// get a job
BSmallPending *p = BPending__List_First(&g->jobs);
ASSERT(!BPending__ListIsRemoved(p))
ASSERT(p->pending)
// remove from jobs list
BPending__List_RemoveFirst(&g->jobs);
// set not pending
BPending__ListMarkRemoved(p);
#ifndef NDEBUG
p->pending = 0;
#endif
// execute job
p->handler(p->user);
return;
}
BSmallPending * BPendingGroup_PeekJob (BPendingGroup *g)
{
DebugObject_Access(&g->d_obj);
return BPending__List_First(&g->jobs);
}
void BSmallPending_Init (BSmallPending *o, BPendingGroup *g, BSmallPending_handler handler, void *user)
{
// init arguments
o->handler = handler;
o->user = user;
// set not pending
BPending__ListMarkRemoved(o);
#ifndef NDEBUG
o->pending = 0;
#endif
// increment pending counter
DebugCounter_Increment(&g->pending_ctr);
// init debug object
DebugObject_Init(&o->d_obj);
}
void BSmallPending_Free (BSmallPending *o, BPendingGroup *g)
{
DebugCounter_Decrement(&g->pending_ctr);
DebugObject_Free(&o->d_obj);
ASSERT(o->pending == !BPending__ListIsRemoved(o))
// remove from jobs list
if (!BPending__ListIsRemoved(o)) {
BPending__List_Remove(&g->jobs, o);
}
}
void BSmallPending_SetHandler (BSmallPending *o, BSmallPending_handler handler, void *user)
{
DebugObject_Access(&o->d_obj);
// set handler
o->handler = handler;
o->user = user;
}
void BSmallPending_Set (BSmallPending *o, BPendingGroup *g)
{
DebugObject_Access(&o->d_obj);
ASSERT(o->pending == !BPending__ListIsRemoved(o))
// remove from jobs list
if (!BPending__ListIsRemoved(o)) {
BPending__List_Remove(&g->jobs, o);
}
// insert to jobs list
BPending__List_Prepend(&g->jobs, o);
// set pending
#ifndef NDEBUG
o->pending = 1;
#endif
}
void BSmallPending_Unset (BSmallPending *o, BPendingGroup *g)
{
DebugObject_Access(&o->d_obj);
ASSERT(o->pending == !BPending__ListIsRemoved(o))
if (!BPending__ListIsRemoved(o)) {
// remove from jobs list
BPending__List_Remove(&g->jobs, o);
// set not pending
BPending__ListMarkRemoved(o);
#ifndef NDEBUG
o->pending = 0;
#endif
}
}
int BSmallPending_IsSet (BSmallPending *o)
{
DebugObject_Access(&o->d_obj);
ASSERT(o->pending == !BPending__ListIsRemoved(o))
return !BPending__ListIsRemoved(o);
}
void BPending_Init (BPending *o, BPendingGroup *g, BPending_handler handler, void *user)
{
BSmallPending_Init(&o->base, g, handler, user);
o->g = g;
}
void BPending_Free (BPending *o)
{
BSmallPending_Free(&o->base, o->g);
}
void BPending_Set (BPending *o)
{
BSmallPending_Set(&o->base, o->g);
}
void BPending_Unset (BPending *o)
{
BSmallPending_Unset(&o->base, o->g);
}
int BPending_IsSet (BPending *o)
{
return BSmallPending_IsSet(&o->base);
}