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类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());
}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;
}