tor-android/external/badvpn_dns/system/BReactor_emscripten.c

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2015-01-25 11:08:34 +00:00
/**
* @file BReactor_emscripten.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 <stdio.h>
#include <inttypes.h>
#include <emscripten/emscripten.h>
#include "BReactor_emscripten.h"
#include <misc/debug.h>
#include <generated/blog_channel_BReactor.h>
static void assert_timer (BTimer *bt, BReactor *reactor)
{
ASSERT(bt->active == 0 || bt->active == 1);
ASSERT(bt->active == 0 || bt->reactor);
ASSERT(bt->active == 0 || (!reactor || bt->reactor == reactor));
}
static void dispatch_pending (BReactor *o)
{
while (BPendingGroup_HasJobs(&o->pending_jobs)) {
BPendingGroup_ExecuteJob(&o->pending_jobs);
}
}
__attribute__((used))
void breactor_timer_cb (BReactor *reactor, BTimer *bt)
{
assert_timer(bt, reactor);
ASSERT(bt->active);
ASSERT(!BPendingGroup_HasJobs(&reactor->pending_jobs));
bt->active = 0;
bt->handler(bt->handler_pointer);
dispatch_pending(reactor);
}
static void small_timer_handler (void *vbt)
{
BSmallTimer *bt = vbt;
bt->handler(bt);
}
void BTimer_Init (BTimer *bt, btime_t msTime, BTimer_handler handler, void *user)
{
bt->msTime = msTime;
bt->handler = handler;
bt->handler_pointer = user;
bt->active = 0;
}
int BTimer_IsRunning (BTimer *bt)
{
assert_timer(bt, NULL);
return bt->active;
}
void BSmallTimer_Init (BSmallTimer *bt, BSmallTimer_handler handler)
{
BTimer_Init(&bt->timer, 0, small_timer_handler, bt);
bt->handler = handler;
}
int BSmallTimer_IsRunning (BSmallTimer *bt)
{
return BTimer_IsRunning(&bt->timer);
}
void BReactor_EmscriptenInit (BReactor *bsys)
{
BPendingGroup_Init(&bsys->pending_jobs);
DebugObject_Init(&bsys->d_obj);
}
void BReactor_EmscriptenFree (BReactor *bsys)
{
DebugObject_Free(&bsys->d_obj);
ASSERT(!BPendingGroup_HasJobs(&bsys->pending_jobs));
}
void BReactor_EmscriptenSync (BReactor *bsys)
{
DebugObject_Access(&bsys->d_obj);
dispatch_pending(bsys);
}
BPendingGroup * BReactor_PendingGroup (BReactor *bsys)
{
DebugObject_Access(&bsys->d_obj);
return &bsys->pending_jobs;
}
void BReactor_SetTimer (BReactor *bsys, BTimer *bt)
{
BReactor_SetTimerAfter(bsys, bt, bt->msTime);
}
void BReactor_SetTimerAfter (BReactor *bsys, BTimer *bt, btime_t after)
{
DebugObject_Access(&bsys->d_obj);
assert_timer(bt, bsys);
if (bt->active) {
BReactor_RemoveTimer(bsys, bt);
}
char cmd[120];
sprintf(cmd, "setTimeout(function(){Module.ccall('breactor_timer_cb','null',['number','number'],[%d,%d]);},%"PRIi64")", (int)bsys, (int)bt, after);
bt->active = 1;
bt->timerid = emscripten_run_script_int(cmd);
bt->reactor = bsys;
}
void BReactor_RemoveTimer (BReactor *bsys, BTimer *bt)
{
DebugObject_Access(&bsys->d_obj);
assert_timer(bt, bsys);
if (!bt->active) {
return;
}
char cmd[30];
sprintf(cmd, "clearTimeout(%d)", bt->timerid);
emscripten_run_script(cmd);
bt->active = 0;
}
void BReactor_SetSmallTimer (BReactor *bsys, BSmallTimer *bt, int mode, btime_t time)
{
ASSERT(mode == BTIMER_SET_RELATIVE)
BReactor_SetTimerAfter(bsys, &bt->timer, time);
}
void BReactor_RemoveSmallTimer (BReactor *bsys, BSmallTimer *bt)
{
BReactor_RemoveTimer(bsys, &bt->timer);
}