mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-16 01:22:18 +03:00
a3fd683de3
* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/* Test for nonblocking read and write.
|
|
|
|
Copyright (C) 2011-2017 Free Software Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
/* Whether to print debugging messages. */
|
|
#define ENABLE_DEBUGGING 0
|
|
|
|
/* Delay (in microseconds) to sleep when write() or read() returned -1 with
|
|
errno = EAGAIN. */
|
|
#define SMALL_DELAY 10000
|
|
|
|
/* Return a memory area, filled with the data to be transferred. */
|
|
static unsigned char *
|
|
init_data (size_t data_block_size)
|
|
{
|
|
unsigned char *data;
|
|
unsigned int i;
|
|
|
|
data = (unsigned char *) malloc (2 * data_block_size);
|
|
ASSERT (data != NULL);
|
|
|
|
for (i = 0; i < 2 * data_block_size; i++)
|
|
data[i] = (unsigned char) (i * i + (7 * i) % 61 + 4);
|
|
|
|
return data;
|
|
}
|
|
|
|
#if ENABLE_DEBUGGING
|
|
# include <stdarg.h>
|
|
static int dbgfprintf (FILE *fp, const char *format, ...)
|
|
_GL_ATTRIBUTE_FORMAT_PRINTF (2, 3);
|
|
static int
|
|
dbgfprintf (FILE *fp, const char *format, ...)
|
|
{
|
|
/* Accumulate the entire line in a buffer, so that the output on fp
|
|
is done atomically. */
|
|
char line[1024];
|
|
size_t line_len;
|
|
struct timeval current_time;
|
|
va_list args;
|
|
int ret;
|
|
|
|
line_len = 0;
|
|
gettimeofday (¤t_time, NULL);
|
|
ret = snprintf (line, sizeof (line), "%.6f ",
|
|
current_time.tv_sec + (double) current_time.tv_usec * 1e-6);
|
|
if (ret < 0)
|
|
return -1;
|
|
line_len = strlen (line);
|
|
|
|
va_start (args, format);
|
|
ret = vsnprintf (line + line_len, sizeof (line) - line_len, format, args);
|
|
va_end (args);
|
|
if (ret < 0)
|
|
return -1;
|
|
line_len += strlen (line + line_len);
|
|
|
|
ret = fwrite (line, 1, line_len, fp);
|
|
|
|
/* Make sure the debugging information is output, so that the order of the
|
|
messages reflects the timeline of events, and so that the output is not
|
|
lost if the program crashes afterwards (relevant on mingw). */
|
|
fflush (fp);
|
|
return ret;
|
|
}
|
|
#else
|
|
# define dbgfprintf if (1) ; else fprintf
|
|
#endif
|
|
|
|
/* Return a textual description of the error code ERR, if FAILED is true.
|
|
Return an empty string if FAILED is false. */
|
|
static const char *
|
|
dbgstrerror (bool failed, int err)
|
|
{
|
|
static char buf[256];
|
|
if (failed)
|
|
{
|
|
sprintf (buf, " %d %s", err, strerror (err));
|
|
return buf;
|
|
}
|
|
else
|
|
return "";
|
|
}
|
|
|
|
#define TIMING_DECLS \
|
|
struct timeval before_time; \
|
|
struct timeval after_time; \
|
|
double spent_time;
|
|
#define START_TIMING \
|
|
gettimeofday (&before_time, NULL);
|
|
#define END_TIMING \
|
|
gettimeofday (&after_time, NULL); \
|
|
spent_time = \
|
|
(after_time.tv_sec - before_time.tv_sec) \
|
|
+ ((double) after_time.tv_usec - (double) before_time.tv_usec) * 1e-6;
|