/* ====================================================================
* The Apache Software License, Version 1.1
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* reserved.
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* modification, are permitted provided that the following conditions
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* "This product includes software developed by the
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*
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* information on the Apache Software Foundation, please see
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*/
#include "apr_shm.h"
#include "apr_errno.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_time.h"
#include
#include
#include
#if APR_HAVE_UNISTD_H
#include
#endif
#if APR_HAS_SHARED_MEMORY
typedef struct mbox {
char msg[1024];
int 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 "/tmp/apr.testshm.shm"
static void msgwait(int sleep_sec, int first_box, int last_box)
{
int i;
apr_time_t start = apr_time_now();
while (apr_time_now() - start < sleep_sec * APR_USEC_PER_SEC) {
for (i = first_box; i < last_box; i++) {
if (boxes[i].msgavail) {
fprintf(stdout, "received a message in box %d, message was: %s\n",
i, boxes[i].msg);
boxes[i].msgavail = 0; /* reset back to 0 */
}
}
apr_sleep(1*APR_USEC_PER_SEC/100);
}
fprintf(stdout, "done waiting on mailboxes...\n");
}
static void msgput(int boxnum, char *msg)
{
fprintf(stdout, "Sending message to box %d\n", boxnum);
apr_cpystrn(boxes[boxnum].msg, msg, strlen(msg));
boxes[boxnum].msgavail = 1;
}
static apr_status_t test_anon(apr_pool_t *parpool)
{
apr_status_t rv;
apr_pool_t *pool;
apr_shm_t *shm;
apr_size_t retsize;
pid_t pid;
int cnt, i, exit_int;
rv = apr_pool_create(&pool, parpool);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Error creating child pool\n");
return rv;
}
printf("Creating anonymous shared memory block (%"
APR_SIZE_T_FMT " bytes)........", SHARED_SIZE);
rv = apr_shm_create(&shm, SHARED_SIZE, NULL, pool);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Error allocating shared memory block\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("Checking size...%" APR_SIZE_T_FMT " bytes...",
retsize = apr_shm_size_get(shm));
if (retsize != SHARED_SIZE) {
fprintf(stderr, "Error allocating shared memory block\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("Allocating shared mbox memory for %d boxes ..............",
N_BOXES);
boxes = apr_shm_baseaddr_get(shm);
if (boxes == NULL) {
fprintf(stderr, "Error creating message boxes.\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("Shared Process Test (child/parent)\n");
pid = fork();
if (pid == 0) { /* child */
msgwait(5, 0, N_BOXES);
exit(0);
}
else if (pid > 0) { /* parent */
i = N_BOXES;
cnt = N_MESSAGES;
while (--cnt > 0) {
if ((i-=3) < 0) {
i += N_BOXES; /* start over at the top */
}
msgput(i, "Sending a message\n");
apr_sleep(1*APR_USEC_PER_SEC/100);
}
}
else {
printf("Error creating a child process\n");
return errno;
}
/* wait for the child */
printf("Waiting for child to exit.\n");
if (waitpid(pid, &exit_int, 0) < 0) {
return errno;
}
printf("Destroying shared memory segment...");
rv = apr_shm_destroy(shm);
if (rv != APR_SUCCESS) {
printf("FAILED\n");
return rv;
}
printf("OK\n");
apr_pool_destroy(pool);
return APR_SUCCESS;
}
static apr_status_t test_named(apr_pool_t *parpool)
{
apr_status_t rv;
apr_pool_t *pool;
apr_shm_t *shm;
apr_size_t retsize;
pid_t pidproducer, pidconsumer;
int exit_int;
rv = apr_pool_create(&pool, parpool);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Error creating child pool\n");
return rv;
}
printf("Creating named shared memory block (%"
APR_SIZE_T_FMT " bytes)........", SHARED_SIZE);
rv = apr_shm_create(&shm, SHARED_SIZE, SHARED_FILENAME, pool);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Error allocating shared memory block\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("Checking size...%" APR_SIZE_T_FMT " bytes...",
retsize = apr_shm_size_get(shm));
if (retsize != SHARED_SIZE) {
fprintf(stderr, "Error allocating shared memory block\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("Allocating shared mbox memory for %d boxes ..............",
N_BOXES);
boxes = apr_shm_baseaddr_get(shm);
if (boxes == NULL) {
fprintf(stderr, "Error creating message boxes.\n");
return rv;
}
fprintf(stdout, "OK\n");
printf("fork()ing and exec()ing children:\n");
pidproducer = fork();
if (pidproducer == 0) { /* child */
/* FIXME: exec a producer */
printf("starting consumer.....\n");
if (execlp("testshmconsumer", "testshmconsumer", (char*)0) < 0) {
return errno;
}
}
else if (pidproducer > 0) { /* parent */
/* fork another child */
pidconsumer = fork();
if (pidconsumer == 0) { /* child */
/* FIXME: exec a producer */
printf("starting producer.....\n");
if (execlp("testshmproducer", "testshmproducer", (char*)0) < 0) {
return errno;
}
}
else if (pidconsumer < 0) { /* parent */
printf("Error creating a child process\n");
return errno;
}
}
else {
printf("Error creating a child process\n");
return errno;
}
/* wait for the child */
printf("Waiting for producer to exit.\n");
if (waitpid(pidconsumer, &exit_int, 0) < 0) {
return errno;
}
if (!WIFEXITED(exit_int)) {
printf("Producer was unsuccessful.\n");
return APR_EGENERAL;
}
printf("Waiting for consumer to exit.\n");
if (waitpid(pidproducer, &exit_int, 0) < 0) {
return errno;
}
if (!WIFEXITED(exit_int)) {
printf("Consumer was unsuccessful.\n");
return APR_EGENERAL;
}
printf("Destroying shared memory segment...");
rv = apr_shm_destroy(shm);
if (rv != APR_SUCCESS) {
printf("FAILED\n");
return rv;
}
printf("OK\n");
apr_pool_destroy(pool);
return APR_SUCCESS;
}
int main(void)
{
apr_status_t rv;
apr_pool_t *pool;
char errmsg[200];
apr_initialize();
printf("APR Shared Memory Test\n");
printf("======================\n\n");
printf("Initializing the pool............................");
if (apr_pool_create(&pool, NULL) != APR_SUCCESS) {
printf("could not initialize pool\n");
exit(-1);
}
printf("OK\n");
rv = test_anon(pool);
if (rv != APR_SUCCESS) {
if (rv == APR_ENOTIMPL) {
printf("Anonymous shared memory unavailable on this platform.\n");
}
else {
printf("Anonymous shared memory test FAILED: [%d] %s\n",
rv, apr_strerror(rv, errmsg, sizeof(errmsg)));
exit(-2);
}
}
printf("Anonymous shared memory test passed!\n");
if (test_named(pool) != APR_SUCCESS) {
printf("Name-based shared memory test FAILED: [%d] %s \n",
rv, apr_strerror(rv, errmsg, sizeof(errmsg)));
exit(-3);
}
printf("Named shared memory test passed!\n");
return 0;
}
#else /* APR_HAS_SHARED_MEMORY */
#error shmem is not supported on this platform
#endif /* APR_HAS_SHARED_MEMORY */