gstreamer/libs/gst/check/libcheck/check_msg.c

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/*
* Check: a unit test framework for C
* Copyright (C) 2001 2002, Arien Malec
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#include <fcntl.h>
#include <stdio.h>
#include "check_error.h"
#include "check.h"
#include "check_list.h"
#include "check_impl.h"
#include "check_msg.h"
#include "check_pack.h"
/* 'Pipe' is implemented as a temporary file to overcome message
* volume limitations outlined in bug #482012. This scheme works well
* with the existing usage wherein the parent does not begin reading
* until the child has done writing and exited.
*
* Pipe life cycle:
* - The parent creates a tmpfile().
* - The fork() call has the effect of duplicating the file descriptor
* and copying (on write) the FILE* data structures.
* - The child writes to the file, and its dup'ed file descriptor and
* data structures are cleaned up on child process exit.
* - Before reading, the parent rewind()'s the file to reset both
* FILE* and underlying file descriptor location data.
* - When finished, the parent fclose()'s the FILE*, deleting the
* temporary file, per tmpfile()'s semantics.
*
* This scheme may break down if the usage changes to asynchronous
* reading and writing.
*/
static FILE *send_file1;
static FILE *send_file2;
static FILE *get_pipe (void);
static void setup_pipe (void);
static void teardown_pipe (void);
static TestResult *construct_test_result (RcvMsg * rmsg, int waserror);
static void tr_set_loc_by_ctx (TestResult * tr, enum ck_result_ctx ctx,
RcvMsg * rmsg);
static FILE *
get_pipe (void)
{
if (send_file2 != 0) {
return send_file2;
}
if (send_file1 != 0) {
return send_file1;
}
eprintf ("No messaging setup", __FILE__, __LINE__);
return NULL;
}
void
send_failure_info (const char *msg)
{
FailMsg fmsg;
fmsg.msg = (char *) msg;
ppack (fileno (get_pipe ()), CK_MSG_FAIL, (CheckMsg *) & fmsg);
}
void
send_loc_info (const char *file, int line)
{
LocMsg lmsg;
lmsg.file = (char *) file;
lmsg.line = line;
ppack (fileno (get_pipe ()), CK_MSG_LOC, (CheckMsg *) & lmsg);
}
void
send_ctx_info (enum ck_result_ctx ctx)
{
CtxMsg cmsg;
cmsg.ctx = ctx;
ppack (fileno (get_pipe ()), CK_MSG_CTX, (CheckMsg *) & cmsg);
}
TestResult *
receive_test_result (int waserror)
{
FILE *fp;
RcvMsg *rmsg;
TestResult *result;
fp = get_pipe ();
if (fp == NULL)
eprintf ("Error in call to get_pipe", __FILE__, __LINE__ - 2);
rewind (fp);
rmsg = punpack (fileno (fp));
teardown_pipe ();
setup_pipe ();
result = construct_test_result (rmsg, waserror);
rcvmsg_free (rmsg);
return result;
}
static void
tr_set_loc_by_ctx (TestResult * tr, enum ck_result_ctx ctx, RcvMsg * rmsg)
{
if (ctx == CK_CTX_TEST) {
tr->file = rmsg->test_file;
tr->line = rmsg->test_line;
rmsg->test_file = NULL;
rmsg->test_line = -1;
} else {
tr->file = rmsg->fixture_file;
tr->line = rmsg->fixture_line;
rmsg->fixture_file = NULL;
rmsg->fixture_line = -1;
}
}
static TestResult *
construct_test_result (RcvMsg * rmsg, int waserror)
{
TestResult *tr;
if (rmsg == NULL)
return NULL;
tr = tr_create ();
if (rmsg->msg != NULL || waserror) {
tr->ctx = (cur_fork_status () == CK_FORK) ? rmsg->lastctx : rmsg->failctx;
tr->msg = rmsg->msg;
rmsg->msg = NULL;
tr_set_loc_by_ctx (tr, tr->ctx, rmsg);
} else if (rmsg->lastctx == CK_CTX_SETUP) {
tr->ctx = CK_CTX_SETUP;
tr->msg = NULL;
tr_set_loc_by_ctx (tr, CK_CTX_SETUP, rmsg);
} else {
tr->ctx = CK_CTX_TEST;
tr->msg = NULL;
tr_set_loc_by_ctx (tr, CK_CTX_TEST, rmsg);
}
return tr;
}
void
setup_messaging (void)
{
setup_pipe ();
}
void
teardown_messaging (void)
{
teardown_pipe ();
}
static void
setup_pipe (void)
{
if (send_file1 != 0) {
if (send_file2 != 0)
eprintf ("Only one nesting of suite runs supported", __FILE__, __LINE__);
send_file2 = tmpfile ();
} else {
send_file1 = tmpfile ();
}
}
static void
teardown_pipe (void)
{
if (send_file2 != 0) {
fclose (send_file2);
send_file2 = 0;
} else if (send_file1 != 0) {
fclose (send_file1);
send_file1 = 0;
} else {
eprintf ("No messaging setup", __FILE__, __LINE__);
}
}