tor-android/external/badvpn_dns/examples/fairqueue_test.c

146 lines
4.4 KiB
C

/**
* @file fairqueue_test.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 <string.h>
#include <stdio.h>
#include <stddef.h>
#include <misc/debug.h>
#include <system/BReactor.h>
#include <base/BLog.h>
#include <system/BTime.h>
#include <flow/PacketPassFairQueue.h>
#include <examples/FastPacketSource.h>
#include <examples/TimerPacketSink.h>
#define OUTPUT_INTERVAL 0
#define REMOVE_INTERVAL 1
#define NUM_INPUTS 3
BReactor reactor;
TimerPacketSink sink;
PacketPassFairQueue fq;
PacketPassFairQueueFlow flows[NUM_INPUTS];
FastPacketSource sources[NUM_INPUTS];
char *data[] = {"0 data", "1 datadatadata", "2 datadatadatadatadata"};
BTimer timer;
int current_cancel;
static void init_input (int i)
{
PacketPassFairQueueFlow_Init(&flows[i], &fq);
FastPacketSource_Init(&sources[i], PacketPassFairQueueFlow_GetInput(&flows[i]), (uint8_t *)data[i], strlen(data[i]), BReactor_PendingGroup(&reactor));
}
static void free_input (int i)
{
FastPacketSource_Free(&sources[i]);
PacketPassFairQueueFlow_Free(&flows[i]);
}
static void reset_input (void)
{
PacketPassFairQueueFlow_AssertFree(&flows[current_cancel]);
printf("removing %d\n", current_cancel);
// remove flow
free_input(current_cancel);
// init flow
init_input(current_cancel);
// increment cancel
current_cancel = (current_cancel + 1) % NUM_INPUTS;
// reset timer
BReactor_SetTimer(&reactor, &timer);
}
static void flow_handler_busy (void *user)
{
PacketPassFairQueueFlow_AssertFree(&flows[current_cancel]);
reset_input();
}
static void timer_handler (void *user)
{
// if flow is busy, request cancel and wait for it
if (PacketPassFairQueueFlow_IsBusy(&flows[current_cancel])) {
printf("cancelling %d\n", current_cancel);
PacketPassFairQueueFlow_RequestCancel(&flows[current_cancel]);
PacketPassFairQueueFlow_SetBusyHandler(&flows[current_cancel], flow_handler_busy, NULL);
return;
}
reset_input();
}
int main ()
{
// initialize logging
BLog_InitStdout();
// init time
BTime_Init();
// initialize reactor
if (!BReactor_Init(&reactor)) {
DEBUG("BReactor_Init failed");
return 1;
}
// initialize sink
TimerPacketSink_Init(&sink, &reactor, 500, OUTPUT_INTERVAL);
// initialize queue
if (!PacketPassFairQueue_Init(&fq, TimerPacketSink_GetInput(&sink), BReactor_PendingGroup(&reactor), 1, 1)) {
DEBUG("PacketPassFairQueue_Init failed");
return 1;
}
// initialize inputs
for (int i = 0; i < NUM_INPUTS; i++) {
init_input(i);
}
// init cancel timer
BTimer_Init(&timer, REMOVE_INTERVAL, timer_handler, NULL);
BReactor_SetTimer(&reactor, &timer);
// init cancel counter
current_cancel = 0;
// run reactor
int ret = BReactor_Exec(&reactor);
BReactor_Free(&reactor);
return ret;
}