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make_malloc.h revision 1.5 
      1 /*	$NetBSD: make_malloc.h,v 1.5 2020/08/01 09:55:00 rillig Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef USE_EMALLOC
     30 void *bmake_malloc(size_t);
     31 void *bmake_realloc(void *, size_t);
     32 char *bmake_strdup(const char *);
     33 char *bmake_strndup(const char *, size_t);
     34 #else
     35 #include <util.h>
     36 #define bmake_malloc(x)         emalloc(x)
     37 #define bmake_realloc(x,y)      erealloc(x,y)
     38 #define bmake_strdup(x)         estrdup(x)
     39 #define bmake_strndup(x,y)      estrndup(x,y)
     40 #endif
     41 
     42 /* Thin wrapper around free(3) to avoid the extra function call in case
     43  * p is NULL, which on x86_64 costs about 12 machine instructions.
     44  * Other platforms are similarly affected.
     45  *
     46  * The case of a NULL pointer happens especially often after Var_Value,
     47  * since only environment variables need to be freed, but not others. */
     48 static inline void
     49 bmake_free(void *p)
     50 {
     51     if (p != NULL)
     52         free(p);
     53 }
     54