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Permit to PCM plug configuration to specify unchanged parameters. Added support for RT signals to async interface. Added ops for PCM mix.

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This commit is contained in:
Abramo Bagnara 2001-07-07 15:53:20 +00:00
parent a5b77b03f6
commit fcd164e622
15 changed files with 492 additions and 158 deletions
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20
src/async.c
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@ -22,6 +22,22 @@
#include "control/control_local.h"
#include <signal.h>
#ifdef SND_ASYNC_RT_SIGNAL
int snd_async_signo;
void snd_async_init(void) __attribute__ ((constructor));
void snd_async_init(void)
{
snd_async_signo = __libc_allocate_rtsig(0);
if (snd_async_signo < 0) {
SNDERR("Unable to find a RT signal to use for snd_async");
exit(1);
}
}
#else
int snd_async_signo = SIGIO;
#endif
static struct list_head snd_async_handlers;
static void snd_async_handler(int signo ATTRIBUTE_UNUSED, siginfo_t *siginfo, void *context ATTRIBUTE_UNUSED)
@ -59,7 +75,7 @@ int snd_async_add_handler(snd_async_handler_t **handler, int fd,
act.sa_flags = SA_RESTART | SA_SIGINFO;
act.sa_sigaction = snd_async_handler;
sigemptyset(&act.sa_mask);
err = sigaction(SIGIO, &act, NULL);
err = sigaction(snd_async_signo, &act, NULL);
if (err < 0) {
SYSERR("sigaction");
return -errno;
@ -76,7 +92,7 @@ int snd_async_del_handler(snd_async_handler_t *handler)
struct sigaction act;
act.sa_flags = 0;
act.sa_handler = SIG_DFL;
err = sigaction(SIGIO, &act, NULL);
err = sigaction(snd_async_signo, &act, NULL);
if (err < 0) {
SYSERR("sigaction");
return -errno;