81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/* Embedded systems may want the simulated signals if no other form exists,
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but UNIX versions will want to use the host facilities.
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Define SIMULATED_SIGNALS when you want to use the simulated versions.
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*/
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/*
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FUNCTION
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<<raise>>---send a signal
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INDEX
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raise
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INDEX
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_raise_r
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ANSI_SYNOPSIS
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#include <signal.h>
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int raise(int <[sig]>);
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int _raise_r(void *<[reent]>, int <[sig]>);
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TRAD_SYNOPSIS
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#include <signal.h>
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int raise(<[sig]>)
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int <[sig]>;
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int _raise_r(<[reent]>, <[sig]>)
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char *<[reent]>;
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int <[sig]>;
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DESCRIPTION
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Send the signal <[sig]> (one of the macros from `<<sys/signal.h>>').
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This interrupts your program's normal flow of execution, and allows a signal
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handler (if you've defined one, using <<signal>>) to take control.
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The alternate function <<_raise_r>> is a reentrant version. The extra
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argument <[reent]> is a pointer to a reentrancy structure.
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RETURNS
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The result is <<0>> if <[sig]> was successfully raised, <<1>>
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otherwise. However, the return value (since it depends on the normal
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flow of execution) may not be visible, unless the signal handler for
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<[sig]> terminates with a <<return>> or unless <<SIG_IGN>> is in
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effect for this signal.
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PORTABILITY
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ANSI C requires <<raise>>, but allows the full set of signal numbers
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to vary from one implementation to another.
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Required OS subroutines: <<getpid>>, <<kill>>.
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*/
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#ifndef SIGNAL_PROVIDED
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int _dummy_raise;
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#else
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#include <reent.h>
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#include <signal.h>
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#ifndef _REENT_ONLY
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int
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_DEFUN (raise, (sig),
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int sig)
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{
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return _raise_r (_REENT, sig);
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}
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#endif
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int
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_DEFUN (_raise_r, (reent, sig),
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struct _reent *reent _AND
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int sig)
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{
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return _kill_r (reent, _getpid_r (reent), sig);
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}
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#endif /* SIGNAL_PROVIDED */
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