third_party/tcmalloc/chromium/src/libc_override_redefine.h

   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.
  14 //     * Neither the name of Google Inc. nor the names of its
  15 // contributors may be used to endorse or promote products derived from
  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
  20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  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
  26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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
  52 void* operator new(size_t size)                  { return tc_new(size);       }
  53 void operator delete(void* p) __THROW            { tc_delete(p);              }
  54 void* operator new[](size_t size)                { return tc_newarray(size);  }
  55 void operator delete[](void* p) __THROW          { tc_deletearray(p);         }
  56 void* operator new(size_t size, const std::nothrow_t& nt) __THROW {
  57   return tc_new_nothrow(size, nt);
  58 }
  59 void* operator new[](size_t size, const std::nothrow_t& nt) __THROW {
  60   return tc_newarray_nothrow(size, nt);
  61 }
  62 void operator delete(void* ptr, const std::nothrow_t& nt) __THROW {
  63   return tc_delete_nothrow(ptr, nt);
  64 }
  65 void operator delete[](void* ptr, const std::nothrow_t& nt) __THROW {
  66   return tc_deletearray_nothrow(ptr, nt);
  67 }
  68 extern "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).
  91 static void ReplaceSystemAlloc() { }
  92
  93 #endif  // TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_