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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TESTSHM_H
#define TESTSHM_H
#include "apr.h"
#include "apr_time.h"
#include "apr_atomic.h"
#include "apr_strings.h"
#include <assert.h>
typedef struct mbox {
char msg[1024];
apr_uint32_t msgavail;
} mbox;
mbox *boxes;
#define N_BOXES 10
#define N_MESSAGES 100
#define SHARED_SIZE (apr_size_t)(N_BOXES * sizeof(mbox))
#define SHARED_FILENAME "data/apr.testshm.shm"
#define MSG "Sending a message"
#if APR_HAS_SHARED_MEMORY
static APR_INLINE
int msgwait(const char *msg, int count, int duration, int sleep_ms)
{
int recvd = 0, i;
apr_time_t start = apr_time_now();
apr_interval_time_t sleep_duration = apr_time_from_sec(duration);
apr_interval_time_t sleep_delay = apr_time_from_msec(sleep_ms);
while (apr_time_now() - start < sleep_duration) {
for (i = 0; i < N_BOXES; i++) {
if (apr_atomic_cas32(&boxes[i].msgavail, 0, 1) == 1) {
if (msg) {
assert(strcmp(boxes[i].msg, msg) == 0);
}
*boxes[i].msg = '\0';
if (++recvd == count) {
return recvd;
}
}
}
apr_sleep(sleep_delay);
}
return recvd;
}
static APR_INLINE
int msgput(const char *msg, int boxnum)
{
if (apr_atomic_cas32(&boxes[boxnum].msgavail, -1, 0) != 0) {
return 0;
}
if (msg) {
apr_cpystrn(boxes[boxnum].msg, msg, sizeof(boxes[boxnum].msg));
}
else {
*boxes[boxnum].msg = '\0';
}
apr_atomic_set32(&boxes[boxnum].msgavail, 1);
return 1;
}
#endif /* APR_HAS_SHARED_MEMORY */
#endif
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