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C++ StringPiece::reset方法代码示例

本文整理汇总了C++中StringPiece::reset方法的典型用法代码示例。如果您正苦于以下问题:C++ StringPiece::reset方法的具体用法?C++ StringPiece::reset怎么用?C++ StringPiece::reset使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在StringPiece的用法示例。


在下文中一共展示了StringPiece::reset方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: createProtectedBuf

// Updates contents so that any read accesses past the last byte will
// cause a SIGSEGV.  It accomplishes this by changing access to the page that
// begins immediately after the end of the contents (as allocators and mmap()
// all operate on page boundaries, this is a reasonable assumption).
// This function will also initialize buf, which caller must free().
void createProtectedBuf(StringPiece& contents, char** buf) {
  ASSERT_LE(contents.size(), kPageSize);
  const size_t kSuccess = 0;
  char* tmp;
  if (kSuccess != posix_memalign((void**)buf, kPageSize, 2 * kPageSize)) {
    ASSERT_FALSE(true);
  }
  mprotect(*buf + kPageSize, kPageSize, PROT_NONE);
  size_t newBegin = kPageSize - contents.size();
  memcpy(*buf + newBegin, contents.data(), contents.size());
  contents.reset(*buf + newBegin, contents.size());
}
开发者ID:baeeq,项目名称:folly,代码行数:17,代码来源:RangeTest.cpp

示例2: createProtectedBuf

// Updates contents so that any read accesses past the last byte will
// cause a SIGSEGV.  It accomplishes this by changing access to the page that
// begins immediately after the end of the contents (as allocators and mmap()
// all operate on page boundaries, this is a reasonable assumption).
// This function will also initialize buf, which caller must free().
void createProtectedBuf(StringPiece& contents, char** buf) {
  ASSERT_LE(contents.size(), kPageSize);
  const size_t kSuccess = 0;
  char* pageAlignedBuf = (char*)aligned_malloc(2 * kPageSize, kPageSize);
  if (pageAlignedBuf == nullptr) {
    ASSERT_FALSE(true);
  }
  // Protect the page after the first full page-aligned region of the
  // malloc'ed buffer
  mprotect(pageAlignedBuf + kPageSize, kPageSize, PROT_NONE);
  size_t newBegin = kPageSize - contents.size();
  memcpy(pageAlignedBuf + newBegin, contents.data(), contents.size());
  contents.reset(pageAlignedBuf + newBegin, contents.size());
  *buf = pageAlignedBuf;
}
开发者ID:astocko,项目名称:folly,代码行数:20,代码来源:RangeTest.cpp


注:本文中的StringPiece::reset方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。