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      1 // Copyright 2012 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "allocation.h"
     29 
     30 #include <stdlib.h>  // For free, malloc.
     31 #include <string.h>  // For memcpy.
     32 #include "checks.h"
     33 #include "utils.h"
     34 
     35 namespace v8 {
     36 namespace internal {
     37 
     38 void* Malloced::New(size_t size) {
     39   void* result = malloc(size);
     40   if (result == NULL) {
     41     v8::internal::FatalProcessOutOfMemory("Malloced operator new");
     42   }
     43   return result;
     44 }
     45 
     46 
     47 void Malloced::Delete(void* p) {
     48   free(p);
     49 }
     50 
     51 
     52 void Malloced::FatalProcessOutOfMemory() {
     53   v8::internal::FatalProcessOutOfMemory("Out of memory");
     54 }
     55 
     56 
     57 #ifdef DEBUG
     58 
     59 static void* invalid = static_cast<void*>(NULL);
     60 
     61 void* Embedded::operator new(size_t size) {
     62   UNREACHABLE();
     63   return invalid;
     64 }
     65 
     66 
     67 void Embedded::operator delete(void* p) {
     68   UNREACHABLE();
     69 }
     70 
     71 
     72 void* AllStatic::operator new(size_t size) {
     73   UNREACHABLE();
     74   return invalid;
     75 }
     76 
     77 
     78 void AllStatic::operator delete(void* p) {
     79   UNREACHABLE();
     80 }
     81 
     82 #endif
     83 
     84 
     85 char* StrDup(const char* str) {
     86   int length = StrLength(str);
     87   char* result = NewArray<char>(length + 1);
     88   memcpy(result, str, length);
     89   result[length] = '\0';
     90   return result;
     91 }
     92 
     93 
     94 char* StrNDup(const char* str, int n) {
     95   int length = StrLength(str);
     96   if (n < length) length = n;
     97   char* result = NewArray<char>(length + 1);
     98   memcpy(result, str, length);
     99   result[length] = '\0';
    100   return result;
    101 }
    102 
    103 
    104 void PreallocatedStorage::LinkTo(PreallocatedStorage* other) {
    105   next_ = other->next_;
    106   other->next_->previous_ = this;
    107   previous_ = other;
    108   other->next_ = this;
    109 }
    110 
    111 
    112 void PreallocatedStorage::Unlink() {
    113   next_->previous_ = previous_;
    114   previous_->next_ = next_;
    115 }
    116 
    117 
    118 PreallocatedStorage::PreallocatedStorage(size_t size)
    119   : size_(size) {
    120   previous_ = next_ = this;
    121 }
    122 
    123 } }  // namespace v8::internal
    124