v8/src/allocation.cc

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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//       notice, this list of conditions and the following disclaimer.
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#include "allocation.h"

#include <stdlib.h>  // For free, malloc.
#include <string.h>  // For memcpy.
#include "checks.h"
#include "utils.h"

namespace v8 {
namespace internal {

void* Malloced::New(size_t size) {
  void* result = malloc(size);
  if (result == NULL) {
    v8::internal::FatalProcessOutOfMemory("Malloced operator new");
  }
  return result;
}


void Malloced::Delete(void* p) {
  free(p);
}


void Malloced::FatalProcessOutOfMemory() {
  v8::internal::FatalProcessOutOfMemory("Out of memory");
}


#ifdef DEBUG

static void* invalid = static_cast<void*>(NULL);

void* Embedded::operator new(size_t size) {
  UNREACHABLE();
  return invalid;
}


void Embedded::operator delete(void* p) {
  UNREACHABLE();
}


void* AllStatic::operator new(size_t size) {
  UNREACHABLE();
  return invalid;
}


void AllStatic::operator delete(void* p) {
  UNREACHABLE();
}

#endif


char* StrDup(const char* str) {
  int length = StrLength(str);
  char* result = NewArray<char>(length + 1);
  memcpy(result, str, length);
  result[length] = '\0';
  return result;
}


char* StrNDup(const char* str, int n) {
  int length = StrLength(str);
  if (n < length) length = n;
  char* result = NewArray<char>(length + 1);
  memcpy(result, str, length);
  result[length] = '\0';
  return result;
}


void PreallocatedStorage::LinkTo(PreallocatedStorage* other) {
  next_ = other->next_;
  other->next_->previous_ = this;
  previous_ = other;
  other->next_ = this;
}


void PreallocatedStorage::Unlink() {
  next_->previous_ = previous_;
  previous_->next_ = next_;
}


PreallocatedStorage::PreallocatedStorage(size_t size)
  : size_(size) {
  previous_ = next_ = this;
}

} }  // namespace v8::internal