107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1998 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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#include <errno.h>
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#include <signal.h>
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#include <alloc.h>
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#include <fail.h>
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#include <memory.h>
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#include <mlvalues.h>
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#include <signals.h>
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#include "unixsupport.h"
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#ifndef NSIG
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#define NSIG 32
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#endif
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#ifdef POSIX_SIGNALS
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static void decode_sigset(value vset, sigset_t * set)
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{
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sigemptyset(set);
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while (vset != Val_int(0)) {
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int sig = convert_signal_number(Int_val(Field(vset, 0)));
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sigaddset(set, sig);
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vset = Field(vset, 1);
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}
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}
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static value encode_sigset(sigset_t * set)
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{
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value res = Val_int(0);
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int i;
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Begin_root(res)
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for (i = 1; i < NSIG; i++)
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if (sigismember(set, i)) {
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value newcons = alloc_small(2, 0);
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Field(newcons, 0) = Val_int(i);
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Field(newcons, 1) = res;
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res = newcons;
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}
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End_roots();
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return res;
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}
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static int sigprocmask_cmd[3] = { SIG_SETMASK, SIG_BLOCK, SIG_UNBLOCK };
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CAMLprim value unix_sigprocmask(value vaction, value vset)
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{
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int how;
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sigset_t set, oldset;
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int retcode;
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how = sigprocmask_cmd[Int_val(vaction)];
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decode_sigset(vset, &set);
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enter_blocking_section();
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retcode = sigprocmask(how, &set, &oldset);
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leave_blocking_section();
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if (retcode == -1) uerror("sigprocmask", Nothing);
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return encode_sigset(&oldset);
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}
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CAMLprim value unix_sigpending(value unit)
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{
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sigset_t pending;
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if (sigpending(&pending) == -1) uerror("sigpending", Nothing);
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return encode_sigset(&pending);
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}
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CAMLprim value unix_sigsuspend(value vset)
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{
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sigset_t set;
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int retcode;
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decode_sigset(vset, &set);
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enter_blocking_section();
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retcode = sigsuspend(&set);
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leave_blocking_section();
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if (retcode == -1 && errno != EINTR) uerror("sigsuspend", Nothing);
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return Val_unit;
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}
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#else
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CAMLprim value unix_sigprocmask(value vaction, value vset)
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{ invalid_argument("Unix.sigprocmask not available"); }
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CAMLprim value unix_sigpending(value unit)
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{ invalid_argument("Unix.sigpending not available"); }
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CAMLprim value unix_sigsuspend(value vset)
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{ invalid_argument("Unix.sigsuspend not available"); }
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#endif
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