Thu Apr 28 2011 17:14:02

Asterisk developer's documentation


res_timing_dahdi.c File Reference

DAHDI timing interface. More...

#include "asterisk.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <math.h>
#include <dahdi/user.h>
#include "asterisk/module.h"
#include "asterisk/timing.h"
#include "asterisk/utils.h"
Include dependency graph for res_timing_dahdi.c:

Go to the source code of this file.

Defines

#define SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see doc/timing.txt\n"

Functions

static void __reg_module (void)
static void __unreg_module (void)
 ASTERISK_FILE_VERSION (__FILE__,"$Revision: 199744 $")
static int dahdi_test_timer (void)
static void dahdi_timer_ack (int handle, unsigned int quantity)
static void dahdi_timer_close (int handle)
static int dahdi_timer_disable_continuous (int handle)
static int dahdi_timer_enable_continuous (int handle)
static enum ast_timer_event dahdi_timer_get_event (int handle)
static unsigned int dahdi_timer_get_max_rate (int handle)
static int dahdi_timer_open (void)
static int dahdi_timer_set_rate (int handle, unsigned int rate)
static int load_module (void)
static int unload_module (void)

Variables

static struct ast_module_info
__MODULE_INFO_SECTION 
__mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "DAHDI Timing Interface" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, }
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_timing_interface dahdi_timing
static void * timing_funcs_handle

Detailed Description

DAHDI timing interface.

Author:
Russell Bryant <russell@digium.com>

Definition in file res_timing_dahdi.c.


Define Documentation

#define SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see doc/timing.txt\n"

Definition at line 140 of file res_timing_dahdi.c.

Referenced by dahdi_test_timer().


Function Documentation

static void __reg_module ( void  ) [static]

Definition at line 206 of file res_timing_dahdi.c.

static void __unreg_module ( void  ) [static]

Definition at line 206 of file res_timing_dahdi.c.

ASTERISK_FILE_VERSION ( __FILE__  ,
"$Revision: 199744 $"   
)
static int dahdi_test_timer ( void  ) [static]

Definition at line 142 of file res_timing_dahdi.c.

References ast_log(), ast_wait_for_input(), LOG_ERROR, and SEE_TIMING.

Referenced by load_module().

{
   int fd;
   int x = 160;
   
   fd = open("/dev/dahdi/timer", O_RDWR);

   if (fd < 0) {
      return -1;
   }

   if (ioctl(fd, DAHDI_TIMERCONFIG, &x)) {
      ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer test failed to set DAHDI_TIMERCONFIG to %d.\n" SEE_TIMING, x);
      close(fd);
      return -1;
   }

   if ((x = ast_wait_for_input(fd, 300)) < 0) {
      ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer could not be polled during the DAHDI timer test.\n" SEE_TIMING);
      close(fd);
      return -1;
   }

   if (!x) {
      const char dahdi_timer_error[] = {
         "Asterisk has detected a problem with your DAHDI configuration and will shutdown for your protection.  You have options:"
         "\n\t1. You only have to compile DAHDI support into Asterisk if you need it.  One option is to recompile without DAHDI support."
         "\n\t2. You only have to load DAHDI drivers if you want to take advantage of DAHDI services.  One option is to unload DAHDI modules if you don't need them."
         "\n\t3. If you need DAHDI services, you must correctly configure DAHDI."
      };
      ast_log(LOG_ERROR, "%s\n" SEE_TIMING, dahdi_timer_error);
      usleep(100);
      close(fd);
      return -1;
   }

   close(fd);

   return 0;
}
static void dahdi_timer_ack ( int  handle,
unsigned int  quantity 
) [static]

Definition at line 96 of file res_timing_dahdi.c.

{
   ioctl(handle, DAHDI_TIMERACK, &quantity);
}
static void dahdi_timer_close ( int  handle) [static]

Definition at line 74 of file res_timing_dahdi.c.

{
   close(handle);
}
static int dahdi_timer_disable_continuous ( int  handle) [static]

Definition at line 108 of file res_timing_dahdi.c.

{
   int flags = -1;

   return ioctl(handle, DAHDI_TIMERPONG, &flags) ? -1 : 0;
}
static int dahdi_timer_enable_continuous ( int  handle) [static]

Definition at line 101 of file res_timing_dahdi.c.

{
   int flags = 1;

   return ioctl(handle, DAHDI_TIMERPING, &flags) ? -1 : 0;
}
static enum ast_timer_event dahdi_timer_get_event ( int  handle) [static]

Definition at line 115 of file res_timing_dahdi.c.

References AST_TIMING_EVENT_CONTINUOUS, and AST_TIMING_EVENT_EXPIRED.

{
   int res;
   int event;

   res = ioctl(handle, DAHDI_GETEVENT, &event);

   if (res) {
      event = DAHDI_EVENT_TIMER_EXPIRED;
   }

   switch (event) {
   case DAHDI_EVENT_TIMER_PING:
      return AST_TIMING_EVENT_CONTINUOUS;
   case DAHDI_EVENT_TIMER_EXPIRED:
   default:
      return AST_TIMING_EVENT_EXPIRED; 
   }
}
static unsigned int dahdi_timer_get_max_rate ( int  handle) [static]

Definition at line 135 of file res_timing_dahdi.c.

{
   return 1000;
}
static int dahdi_timer_open ( void  ) [static]

Definition at line 69 of file res_timing_dahdi.c.

{
   return open("/dev/dahdi/timer", O_RDWR);
}
static int dahdi_timer_set_rate ( int  handle,
unsigned int  rate 
) [static]

Definition at line 79 of file res_timing_dahdi.c.

References ast_log(), and LOG_ERROR.

{
   int samples;

   /* DAHDI timers are configured using a number of samples,
    * based on an 8 kHz sample rate. */
   samples = (unsigned int) roundf((8000.0 / ((float) rate)));

   if (ioctl(handle, DAHDI_TIMERCONFIG, &samples)) {
      ast_log(LOG_ERROR, "Failed to configure DAHDI timing fd for %u sample timer ticks\n",
         samples);
      return -1;
   }

   return 0;
}
static int unload_module ( void  ) [static]

Variable Documentation

struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "DAHDI Timing Interface" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, } [static]

Definition at line 206 of file res_timing_dahdi.c.

Definition at line 206 of file res_timing_dahdi.c.

Definition at line 56 of file res_timing_dahdi.c.

void* timing_funcs_handle [static]

Definition at line 45 of file res_timing_dahdi.c.

Referenced by load_module(), and unload_module().