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#ifndef CYGONCE_LIBC_SIGNALS_SIGNAL_INL

#define CYGONCE_LIBC_SIGNALS_SIGNAL_INL

//========================================================================

//

//      signal.inl

//

//      Inline functions for implementation of ISO C and POSIX signals

//

//========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     jlarmour

// Contributors:

// Date:          2000-04-18

// Purpose:       Implements required inline functions of ISO C and

//                POSIX 1003.1 signals

// Description:

// Usage:         Do not include this file directly, instead use 

//

//####DESCRIPTIONEND####

//

//========================================================================

// CONFIGURATION

#include   // libc signals configuration

// INCLUDES

#include                 // Header for this file, just in case

#include      // Assertion infrastructure

#include     // Tracing infrastructure

// GLOBALS

extern __sighandler_t cyg_libc_signal_handlers[];

#ifdef CYGDBG_USE_TRACING

extern cyg_uint8 cyg_libc_signals_raise_trace_level;

#endif

// DEFINES

// The following are overriden by the libc implementation to get a non-inline

// version to prevent duplication of code

#ifndef CYGPRI_LIBC_SIGNALS_RAISE_INLINE

# define CYGPRI_LIBC_SIGNALS_RAISE_INLINE extern __inline__

#endif

#ifndef CYGPRI_LIBC_SIGNALS_SIGNAL_INLINE

# define CYGPRI_LIBC_SIGNALS_SIGNAL_INLINE extern __inline__

#endif

// FUNCTION PROTOTYPES

#ifdef __cplusplus

extern "C" {

#endif

// Default signal handler - SIG_DFL

extern void cyg_libc_signals_default_handler(int __sig);

#ifdef CYGSEM_LIBC_SIGNALS_THREAD_SAFE

extern cyg_bool cyg_libc_signals_lock_do_lock(void);

extern void cyg_libc_signals_lock_do_unlock(void);

#endif

// INLINE FUNCTIONS

/////////////////////////////

// cyg_libc_signals_lock() //

/////////////////////////////

static inline cyg_bool

cyg_libc_signals_lock(void)

{

#ifdef CYGSEM_LIBC_SIGNALS_THREAD_SAFE

    return cyg_libc_signals_lock_do_lock();

#else

    return true;

#endif

} // cyg_libc_signals_lock()

///////////////////////////////

// cyg_libc_signals_unlock() //

///////////////////////////////

static inline void

cyg_libc_signals_unlock(void)

{

#ifdef CYGSEM_LIBC_SIGNALS_THREAD_SAFE

    cyg_libc_signals_lock_do_unlock();

#else

    return;

#endif

} // cyg_libc_signals_unlock()

// ISO C functions

//////////////////////////////

// signal() - ISO C 7.7.1   //

//////////////////////////////

#ifdef CYGIMP_LIBC_SIGNALS_SIGNAL_INLINE

#ifdef CYGSEM_LIBC_SIGNALS_SIGNAL_SETS_ERRNO

# include                  // errno

#endif

CYGPRI_LIBC_SIGNALS_SIGNAL_INLINE __sighandler_t

signal(int __sig, __sighandler_t __handler)

{

    __sighandler_t __old_handler;

    CYG_REPORT_FUNCNAMETYPE( "__signal", "returning %08x" );

    CYG_REPORT_FUNCARG2( "signal number = %d, requested handler is at %08x",

                         __sig, __handler );

    // check valid signal - raise should not raise the null signal either

    if ( (__sig >= CYGNUM_LIBC_SIGNALS) || (__sig <= 0) ) {

#ifdef CYGSEM_LIBC_SIGNALS_BAD_SIGNAL_FATAL

        CYG_FAIL("__signal() passed bad signal number");

#else

# ifdef CYGSEM_LIBC_SIGNALS_SIGNAL_SETS_ERRNO

        errno = EINVAL;

# endif

        return SIG_ERR;

#endif

    }

    // paranoia

    CYG_CHECK_DATA_PTR( cyg_libc_signal_handlers,

                        "signal handler array is invalid!" );

    if ( (__handler != SIG_IGN) && (__handler != SIG_DFL) )

        CYG_CHECK_FUNC_PTR( __handler, "__signal() passed invalid handler");

    if (!cyg_libc_signals_lock()) {

#ifdef CYGSEM_LIBC_SIGNALS_SIGNAL_SETS_ERRNO

        errno = EINTR;

#endif

        return SIG_ERR;

    } // if

    __old_handler = cyg_libc_signal_handlers[__sig];

    cyg_libc_signal_handlers[__sig] = __handler;

    cyg_libc_signals_unlock();

    CYG_REPORT_RETVAL( __old_handler );

    return __old_handler;

} // signal()

#endif // ifdef CYGIMP_LIBC_SIGNALS_SIGNAL_INLINE

///////////////////////////

// raise() - ISO C 7.7.2 //

///////////////////////////

#ifdef CYGIMP_LIBC_SIGNALS_RAISE_INLINE

#ifdef CYGSEM_LIBC_SIGNALS_RAISE_SETS_ERRNO

# include                  // errno

#endif

CYGPRI_LIBC_SIGNALS_RAISE_INLINE int

raise(int __sig)

{

    int __ret=0;

    __sighandler_t __sigfun;

    CYG_REPORT_FUNCNAMETYPE( "__raise", "returning %d" );

    CYG_REPORT_FUNCARG1( "signal number = %d", __sig );

    // check valid signal - raise should not raise the null signal either

    if ( (__sig >= CYGNUM_LIBC_SIGNALS) || (__sig <= 0) ) {

#ifdef CYGSEM_LIBC_SIGNALS_BAD_SIGNAL_FATAL

        CYG_FAIL("__raise() passed bad signal number");

#else

# ifdef CYGSEM_LIBC_SIGNALS_RAISE_SETS_ERRNO

        errno = EINVAL;

# endif

        return -1;

#endif

    }

    // paranoia

    CYG_CHECK_DATA_PTR( cyg_libc_signal_handlers,

                        "signal handler array is invalid!" );

    if (!cyg_libc_signals_lock()) {

#ifdef CYGSEM_LIBC_SIGNALS_RAISE_SETS_ERRNO

        errno = EINTR;

#endif

        return -1;

    } // if

    __sigfun = cyg_libc_signal_handlers[__sig];

    if ( __sigfun == SIG_DFL ) {

        CYG_TRACE0(cyg_libc_signals_raise_trace_level,

                   "signal handler returned is SIG_DFL");

        cyg_libc_signals_unlock();

        cyg_libc_signals_default_handler(__sig);

    } else if ( __sigfun == SIG_IGN ) {

        CYG_TRACE0(cyg_libc_signals_raise_trace_level,

                   "signal handler returned is SIG_IGN");

        cyg_libc_signals_unlock();

    } else {

        CYG_TRACE1(cyg_libc_signals_raise_trace_level,

                   "signal handler returned is at %08x", __sigfun);

        // call the signal handler directly

        cyg_libc_signal_handlers[__sig] = SIG_DFL;

        cyg_libc_signals_unlock();

        CYG_CHECK_FUNC_PTR( __sigfun, "returned signal handler invalid!");

        (*__sigfun)(__sig);

    }

    CYG_REPORT_RETVAL( __ret );

    return __ret;

} // raise()

#endif // ifdef CYGIMP_LIBC_SIGNALS_RAISE_INLINE

#ifdef __cplusplus

} // extern "C"

#endif

#endif // CYGONCE_LIBC_SIGNALS_SIGNAL_INL multiple inclusion protection

// EOF signal.inl