/* ==================================================================== * The Apache Software License, Version 1.1 * * Copyright (c) 2000-2001 The Apache Software Foundation. All rights * reserved. * * 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. 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For more * information on the Apache Software Foundation, please see * . */ #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 */