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/* ______ ___ ___
* /\ _ \ /\_ \ /\_ \
* \ \ \L\ \\//\ \ \//\ \ __ __ _ __ ___
* \ \ __ \ \ \ \ \ \ \ /'__`\ /'_ `\/\`'__\/ __`\
* \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \
* \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/
* \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/
* /\____/
* \_/__/
*
* Standard driver helpers for Linux Allegro.
*
* By Marek Habersack, mangled by George Foot.
*
* See readme.txt for copyright information.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include "allegro.h"
#include "allegro/internal/aintern.h"
#include "allegro/platform/aintunix.h"
#include "linalleg.h"
#include <unistd.h>
/* List of standard drivers */
STD_DRIVER *__al_linux_std_drivers[N_STD_DRIVERS];
static int std_drivers_suspended = FALSE;
/* __al_linux_add_standard_driver:
* Adds a standard driver; returns 0 on success, non-zero if the sanity
* checks fail.
*/
int __al_linux_add_standard_driver (STD_DRIVER *spec)
{
if (!spec) return 1;
if (spec->type >= N_STD_DRIVERS) return 2;
if (!spec->update) return 3;
if (spec->fd < 0) return 4;
__al_linux_std_drivers[spec->type] = spec;
spec->resume();
return 0;
}
/* __al_linux_remove_standard_driver:
* Removes a standard driver, returning 0 on success or non-zero on
* failure.
*/
int __al_linux_remove_standard_driver (STD_DRIVER *spec)
{
if (!spec) return 1;
if (spec->type >= N_STD_DRIVERS) return 3;
if (!__al_linux_std_drivers[spec->type]) return 4;
if (__al_linux_std_drivers[spec->type] != spec) return 5;
spec->suspend();
__al_linux_std_drivers[spec->type] = NULL;
return 0;
}
/* __al_linux_update_standard_drivers:
* Updates all drivers.
*/
void __al_linux_update_standard_drivers (int threaded)
{
int i;
if (!std_drivers_suspended) {
for (i = 0; i < N_STD_DRIVERS; i++)
if (__al_linux_std_drivers[i])
__al_linux_std_drivers[i]->update();
}
}
/* __al_linux_suspend_standard_drivers:
* Temporary disable standard drivers during a VT switch.
*/
void __al_linux_suspend_standard_drivers (void)
{
ASSERT(!std_drivers_suspended);
std_drivers_suspended = TRUE;
}
/* __al_linux_resume_standard_drivers:
* Re-enable standard drivers after a VT switch.
*/
void __al_linux_resume_standard_drivers (void)
{
ASSERT(std_drivers_suspended);
std_drivers_suspended = FALSE;
}
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