test_poll.c File Reference

Poll Tests. More...

#include "asterisk.h"
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include "asterisk/utils.h"
#include "asterisk/module.h"
#include "asterisk/test.h"
#include "asterisk/poll-compat.h"

Include dependency graph for test_poll.c:

Go to the source code of this file.

Macros
#define	FDNO   3
#define	RESET   for (i = 0; i < 4; i++) { pfd[i].revents = 0; }

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
	AST_TEST_DEFINE (poll_test)
static void *	failsafe_cancel (void *vparent)
static int	load_module (void)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Poll test" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
static const struct ast_module_info *	ast_module_info = &__mod_info

Detailed Description

Poll Tests.

Author

Tilghman Lesher <tlesher AT digium DOT com> 

Verify that the various poll implementations work as desired (ast_poll, ast_poll2)

Definition in file test_poll.c.

Macro Definition Documentation

FDNO

#define FDNO   3

RESET

#define RESET   for (i = 0; i < 4; i++) { pfd[i].revents = 0; }

Definition at line 63 of file test_poll.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 246 of file test_poll.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 246 of file test_poll.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 246 of file test_poll.c.

AST_TEST_DEFINE()

AST_TEST_DEFINE

(

poll_test

)

Definition at line 64 of file test_poll.c.

{
#define FDNO 3
    int fd[2], res = AST_TEST_PASS, i, res2;
    int rdblocker[2];
#if FDNO > 3
    int wrblocker[2], consec_interrupt = 0;
#endif
    struct pollfd pfd[4] = { { .events = POLLOUT, }, { .events = POLLIN, }, { .events = POLLIN }, { .events = POLLOUT } };
    pthread_t failsafe_tid;
    struct timeval tv = { 0, 0 };
#if FDNO > 3
    char garbage[256] =
        "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@/"
        "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@/"
        "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@/"
        "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@/";
#endif
 
    switch (cmd) {
    case TEST_INIT:
        info->name = "poll_test";
        info->category = "/main/poll/";
        info->summary = "unit test for the ast_poll() API";
        info->description =
            "Verifies behavior for the ast_poll() API call";
        return AST_TEST_NOT_RUN;
    case TEST_EXECUTE:
        break;
    }
 
    ast_test_status_update(test, "Creating handle that should NEVER block on write\n");
    if ((fd[0] = open("/dev/null", O_WRONLY)) < 0) {
        ast_test_status_update(test, "Unable to open a writable handle to /dev/null: %s\n", strerror(errno));
        return AST_TEST_FAIL;
    }
 
    ast_test_status_update(test, "Creating handle that should NEVER block on read\n");
    if ((fd[1] = open("/dev/zero", O_RDONLY)) < 0) {
        ast_test_status_update(test, "Unable to open a readable handle to /dev/zero: %s\n", strerror(errno));
        close(fd[0]);
        return AST_TEST_FAIL;
    }
 
    ast_test_status_update(test, "Creating handle that should block on read\n");
    if (pipe(rdblocker) < 0) {
        ast_test_status_update(test, "Unable to open a pipe: %s\n", strerror(errno));
        close(fd[0]);
        close(fd[1]);
        return AST_TEST_FAIL;
    }
 
#if FDNO > 3
    ast_test_status_update(test, "Creating handle that should block on write\n");
    if (pipe(wrblocker) < 0) {
        ast_test_status_update(test, "Unable to open a pipe: %s\n", strerror(errno));
        close(fd[0]);
        close(fd[1]);
        close(rdblocker[0]);
        close(rdblocker[1]);
        return AST_TEST_FAIL;
    }
 
    ast_test_status_update(test, "Starting thread to ensure we don't block forever\n");
    if (ast_pthread_create_background(&failsafe_tid, NULL, failsafe_cancel, (void *) (long) pthread_self())) {
        ast_test_status_update(test, "Unable to start failsafe thread\n");
        close(fd[0]);
        close(fd[1]);
        close(fd[2]);
        close(rdblocker[0]);
        close(rdblocker[1]);
        close(wrblocker[0]);
        close(wrblocker[1]);
        return AST_TEST_FAIL;
    }
 
    /* Fill the pipe full of data */
    ast_test_status_update(test, "Making pipe block on write\n");
    for (i = 0; i < 4096; i++) { /* 1MB of data should be more than enough for any pipe */
        errno = 0;
        if (write(wrblocker[1], garbage, sizeof(garbage)) < sizeof(garbage)) {
            ast_test_status_update(test, "Got %d\n", errno);
            if (errno == EINTR && ++consec_interrupt > 1) {
                break;
            }
        } else {
            consec_interrupt = 0;
        }
    }
 
    ast_test_status_update(test, "Cancelling failsafe thread.\n");
    pthread_cancel(failsafe_tid);
    pthread_kill(failsafe_tid, SIGURG);
    pthread_join(failsafe_tid, NULL);
#endif
 
    pfd[0].fd = fd[0];
    pfd[1].fd = fd[1];
    pfd[2].fd = rdblocker[0];
#if FDNO > 3
    pfd[3].fd = wrblocker[1];
#endif
 
    /* Need to ensure the infinite timeout doesn't stall the process */
    ast_test_status_update(test, "Starting thread to ensure we don't block forever\n");
    if (ast_pthread_create_background(&failsafe_tid, NULL, failsafe_cancel, (void *) (long) pthread_self())) {
        ast_test_status_update(test, "Unable to start failsafe thread\n");
        close(fd[0]);
        close(fd[1]);
        close(rdblocker[0]);
        close(rdblocker[1]);
#if FDNO > 3
        close(wrblocker[0]);
        close(wrblocker[1]);
#endif
        return AST_TEST_FAIL;
    }
 
    RESET;
    if ((res2 = ast_poll(pfd, FDNO, -1)) != 2) {
        ast_test_status_update(test, "ast_poll does not return that only two handles are available (inf timeout): %d, %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    RESET;
    if ((res2 = ast_poll2(pfd, FDNO, NULL)) != 2) {
        ast_test_status_update(test, "ast_poll2 does not return that only two handles are available (inf timeout): %d %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    ast_test_status_update(test, "Cancelling failsafe thread.\n");
    pthread_cancel(failsafe_tid);
    pthread_kill(failsafe_tid, SIGURG);
    pthread_join(failsafe_tid, NULL);
 
    RESET;
    if (ast_poll(pfd, FDNO, 0) != 2) {
        ast_test_status_update(test, "ast_poll does not return that only two handles are available (0 timeout): %d, %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    RESET;
    if (ast_poll2(pfd, FDNO, &tv) != 2) {
        ast_test_status_update(test, "ast_poll2 does not return that only two handles are available (0 timeout): %d, %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    RESET;
    if (ast_poll(pfd, FDNO, 1) != 2) {
        ast_test_status_update(test, "ast_poll does not return that only two handles are available (1ms timeout): %d, %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    tv.tv_usec = 1000;
    if (ast_poll2(pfd, FDNO, &tv) != 2) {
        ast_test_status_update(test, "ast_poll2 does not return that only two handles are available (1ms timeout): %d, %s\n", res2, res2 == -1 ? strerror(errno) : "");
        res = AST_TEST_FAIL;
    }
 
    close(fd[0]);
    close(fd[1]);
    close(rdblocker[0]);
    close(rdblocker[1]);
#if FDNO > 3
    close(wrblocker[0]);
    close(wrblocker[1]);
#endif
    return res;
}

References ast_poll, ast_poll2(), ast_pthread_create_background, AST_TEST_FAIL, AST_TEST_NOT_RUN, AST_TEST_PASS, ast_test_status_update, errno, failsafe_cancel(), FDNO, NULL, RESET, TEST_EXECUTE, and TEST_INIT.

failsafe_cancel()

static void * failsafe_cancel ( void *  vparent )

static

Definition at line 47 of file test_poll.c.

{
    pthread_t parent = (pthread_t) (long) vparent;
 
    sleep(1);
    pthread_testcancel();
    pthread_kill(parent, SIGURG);
    sleep(1);
    pthread_testcancel();
    pthread_kill(parent, SIGURG);
    sleep(1);
    pthread_testcancel();
    pthread_kill(parent, SIGURG);
    pthread_exit(NULL);
}

References NULL.

Referenced by AST_TEST_DEFINE().

load_module()

static int load_module ( void  )

static

Definition at line 240 of file test_poll.c.

{
    AST_TEST_REGISTER(poll_test);
    return AST_MODULE_LOAD_SUCCESS;
}

References AST_MODULE_LOAD_SUCCESS, and AST_TEST_REGISTER.

unload_module()

static int unload_module ( void  )

static

Definition at line 234 of file test_poll.c.

{
    AST_TEST_UNREGISTER(poll_test);
    return 0;
}

References AST_TEST_UNREGISTER.

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Poll test" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }

static

Definition at line 246 of file test_poll.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 246 of file test_poll.c.