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/*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/system.h>
#include <sys/types.h>
#include <string.h>
#include <stdarg.h>
#include "tmacros.h"
static rtems_id locked_print_semaphore; /* synchronisation semaphore */
void locked_print_initialize(void)
{
rtems_status_code sc;
static bool initted = false;
if ( initted )
return;
initted = true;
/* Create/verify synchronisation semaphore */
sc = rtems_semaphore_create(
rtems_build_name ('S', 'E', 'M', '1'),
1,
RTEMS_LOCAL |
RTEMS_BINARY_SEMAPHORE |
RTEMS_PRIORITY_CEILING |
RTEMS_PRIORITY,
1,
&locked_print_semaphore
);
directive_failed( sc, "rtems_semaphore_create" );
}
void locked_printf(const char *fmt, ...) {
va_list ap; /* points to each unnamed argument in turn */
rtems_status_code sc;
locked_print_initialize();
/* Lock semaphore without releasing the cpu */
do {
sc = rtems_semaphore_obtain( locked_print_semaphore, RTEMS_NO_WAIT, 0 );
} while (sc != RTEMS_SUCCESSFUL );
va_start(ap, fmt); /* make ap point to 1st unnamed arg */
vprintf(fmt, ap);
va_end(ap); /* clean up when done */
/* Release the semaphore */
sc = rtems_semaphore_release( locked_print_semaphore );
}
void locked_printk(const char *fmt, ...) {
va_list ap; /* points to each unnamed argument in turn */
rtems_status_code sc;
locked_print_initialize();
/* Lock semaphore without releasing the cpu */
do {
sc = rtems_semaphore_obtain( locked_print_semaphore, RTEMS_NO_WAIT, 0 );
} while (sc != RTEMS_SUCCESSFUL );
va_start(ap, fmt); /* make ap point to 1st unnamed arg */
vprintk(fmt, ap);
va_end(ap); /* clean up when done */
/* Release the semaphore */
sc = rtems_semaphore_release( locked_print_semaphore );
}
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