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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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#include "implement.h"
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/*
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DEFAULT NEW HANDLER
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The default new handler throws a bad_alloc exception.
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*/
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static void default_new_handler ()
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{
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throw bad_alloc () ;
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}
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/*
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CURRENT NEW HANDLER
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This value gives the current new handler function.
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*/
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static new_handler crt_new_handler = default_new_handler ;
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/*
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SET CURRENT NEW HANDLER
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This routine sets the current new handler function to fn, returning
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the previous value.
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*/
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new_handler std::set_new_handler ( new_handler fn ) throw ()
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{
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new_handler prev = crt_new_handler ;
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crt_new_handler = fn ;
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return ( prev ) ;
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}
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/*
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STANDARD MEMORY ALLOCATION FUNCTION
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This routine allocates sz bytes of memory, throwing an exception if
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this is not possible.
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*/
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void *__TCPPLUS_new ( size_t sz ) throw ( bad_alloc )
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{
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void *p ;
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if ( sz == 0 ) sz = 1 ;
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while ( p = malloc ( sz ), p == NULL ) {
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new_handler fn = crt_new_handler ;
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if ( fn == NULL ) throw bad_alloc () ;
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fn () ;
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}
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return ( p ) ;
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}
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/*
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NO-EXCEPTION MEMORY ALLOCATION FUNCTION
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This routine allocates sz bytes of memory, returning a null pointer if
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this is not possible.
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*/
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void *__TCPPLUS_new_nothrow ( size_t sz ) throw ()
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{
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void *p ;
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if ( sz == 0 ) sz = 1 ;
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while ( p = malloc ( sz ), p == NULL ) {
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try {
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new_handler fn = crt_new_handler ;
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if ( fn == NULL ) return ( NULL ) ;
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fn () ;
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}
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catch ( const bad_alloc & ) {
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// Return null if handler throws an exception
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return ( NULL ) ;
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}
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}
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return ( p ) ;
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}
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/*
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STANDARD MEMORY DEALLOCATION FUNCTION
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This routine deallocates the memory given by p.
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*/
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void __TCPPLUS_delete ( void *p ) throw ()
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{
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if ( p ) free ( p ) ;
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return ;
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}
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/*
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THE STANDARD NOTHROW OBJECT
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This object is used in the no-exception memory allocation routines.
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*/
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const nothrow_t std::nothrow = {} ;
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