1// Copyright (c) 2011, Google Inc.
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8//     * Redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer.
10//     * Redistributions in binary form must reproduce the above
11// copyright notice, this list of conditions and the following disclaimer
12// in the documentation and/or other materials provided with the
13// distribution.
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16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30// ---
31// Author: Craig Silverstein <opensource@google.com>
32//
33// Used on systems that don't have their own definition of
34// malloc/new/etc.  (Typically this will be a windows msvcrt.dll that
35// has been edited to remove the definitions.)  We can just define our
36// own as normal functions.
37//
38// This should also work on systems were all the malloc routines are
39// defined as weak symbols, and there's no support for aliasing.
40
41#ifndef TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_
42#define TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_
43
44#ifdef HAVE_SYS_CDEFS_H
45#include <sys/cdefs.h>    // for __THROW
46#endif
47
48#ifndef __THROW    // I guess we're not on a glibc-like system
49# define __THROW   // __THROW is just an optimization, so ok to make it ""
50#endif
51
52void* operator new(size_t size)                  { return tc_new(size);       }
53void operator delete(void* p) __THROW            { tc_delete(p);              }
54void* operator new[](size_t size)                { return tc_newarray(size);  }
55void operator delete[](void* p) __THROW          { tc_deletearray(p);         }
56void* operator new(size_t size, const std::nothrow_t& nt) __THROW {
57  return tc_new_nothrow(size, nt);
58}
59void* operator new[](size_t size, const std::nothrow_t& nt) __THROW {
60  return tc_newarray_nothrow(size, nt);
61}
62void operator delete(void* ptr, const std::nothrow_t& nt) __THROW {
63  return tc_delete_nothrow(ptr, nt);
64}
65void operator delete[](void* ptr, const std::nothrow_t& nt) __THROW {
66  return tc_deletearray_nothrow(ptr, nt);
67}
68extern "C" {
69  void* malloc(size_t s) __THROW                 { return tc_malloc(s);       }
70  void  free(void* p) __THROW                    { tc_free(p);                }
71  void* realloc(void* p, size_t s) __THROW       { return tc_realloc(p, s);   }
72  void* calloc(size_t n, size_t s) __THROW       { return tc_calloc(n, s);    }
73  void  cfree(void* p) __THROW                   { tc_cfree(p);               }
74  void* memalign(size_t a, size_t s) __THROW     { return tc_memalign(a, s);  }
75  void* valloc(size_t s) __THROW                 { return tc_valloc(s);       }
76  void* pvalloc(size_t s) __THROW                { return tc_pvalloc(s);      }
77  int posix_memalign(void** r, size_t a, size_t s) __THROW {
78    return tc_posix_memalign(r, a, s);
79  }
80  void malloc_stats(void) __THROW                { tc_malloc_stats();         }
81  int mallopt(int cmd, int v) __THROW            { return tc_mallopt(cmd, v); }
82#ifdef HAVE_STRUCT_MALLINFO
83  struct mallinfo mallinfo(void) __THROW         { return tc_mallinfo();      }
84#endif
85  size_t malloc_size(void* p) __THROW            { return tc_malloc_size(p); }
86  size_t malloc_usable_size(void* p) __THROW     { return tc_malloc_size(p); }
87}  // extern "C"
88
89// No need to do anything at tcmalloc-registration time: we do it all
90// via overriding weak symbols (at link time).
91static void ReplaceSystemAlloc() { }
92
93#endif  // TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_
94