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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1998 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
#include <errno.h>
#include <signal.h>
#include <caml/alloc.h>
#include <caml/fail.h>
#include <caml/memory.h>
#include <caml/mlvalues.h>
#include <caml/signals.h>
#include "unixsupport.h"
#ifndef NSIG
#define NSIG 64
#endif
#ifdef POSIX_SIGNALS
static void decode_sigset(value vset, sigset_t * set)
{
sigemptyset(set);
while (vset != Val_int(0)) {
int sig = caml_convert_signal_number(Int_val(Field(vset, 0)));
sigaddset(set, sig);
vset = Field(vset, 1);
}
}
static value encode_sigset(sigset_t * set)
{
value res = Val_int(0);
int i;
Begin_root(res)
for (i = 1; i < NSIG; i++)
if (sigismember(set, i) > 0) {
value newcons = alloc_small(2, 0);
Field(newcons, 0) = Val_int(caml_rev_convert_signal_number(i));
Field(newcons, 1) = res;
res = newcons;
}
End_roots();
return res;
}
static int sigprocmask_cmd[3] = { SIG_SETMASK, SIG_BLOCK, SIG_UNBLOCK };
CAMLprim value unix_sigprocmask(value vaction, value vset)
{
int how;
sigset_t set, oldset;
int retcode;
how = sigprocmask_cmd[Int_val(vaction)];
decode_sigset(vset, &set);
enter_blocking_section();
retcode = sigprocmask(how, &set, &oldset);
leave_blocking_section();
if (retcode == -1) uerror("sigprocmask", Nothing);
return encode_sigset(&oldset);
}
CAMLprim value unix_sigpending(value unit)
{
sigset_t pending;
if (sigpending(&pending) == -1) uerror("sigpending", Nothing);
return encode_sigset(&pending);
}
CAMLprim value unix_sigsuspend(value vset)
{
sigset_t set;
int retcode;
decode_sigset(vset, &set);
enter_blocking_section();
retcode = sigsuspend(&set);
leave_blocking_section();
if (retcode == -1 && errno != EINTR) uerror("sigsuspend", Nothing);
return Val_unit;
}
#else
CAMLprim value unix_sigprocmask(value vaction, value vset)
{ invalid_argument("Unix.sigprocmask not available"); }
CAMLprim value unix_sigpending(value unit)
{ invalid_argument("Unix.sigpending not available"); }
CAMLprim value unix_sigsuspend(value vset)
{ invalid_argument("Unix.sigsuspend not available"); }
#endif
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