本文整理汇总了C++中FileMap::advise方法的典型用法代码示例。如果您正苦于以下问题：C++ FileMap::advise方法的具体用法？C++ FileMap::advise怎么用？C++ FileMap::advise使用的例子？那么, 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FileMap的用法示例。
在下文中一共展示了FileMap::advise方法的1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: open
status_t Tokenizer::open(const String8& filename, Tokenizer** outTokenizer) {
*outTokenizer = NULL;
int result = NO_ERROR;
int fd = ::open(filename.string(), O_RDONLY);
if (fd < 0) {
result = -errno;
ALOGE("Error opening file '%s', %s.", filename.string(), strerror(errno));
} else {
struct stat stat;
if (fstat(fd, &stat)) {
result = -errno;
ALOGE("Error getting size of file '%s', %s.", filename.string(), strerror(errno));
} else {
size_t length = size_t(stat.st_size);
FileMap* fileMap = new FileMap();
bool ownBuffer = false;
char* buffer;
if (fileMap->create(NULL, fd, 0, length, true)) {
fileMap->advise(FileMap::SEQUENTIAL);
buffer = static_cast<char*>(fileMap->getDataPtr());
} else {
delete fileMap;
fileMap = NULL;
// Fall back to reading into a buffer since we can't mmap files in sysfs.
// The length we obtained from stat is wrong too (it will always be 4096)
// so we must trust that read will read the entire file.
buffer = new char[length];
ownBuffer = true;
ssize_t nrd = read(fd, buffer, length);
if (nrd < 0) {
result = -errno;
ALOGE("Error reading file '%s', %s.", filename.string(), strerror(errno));
delete[] buffer;
buffer = NULL;
} else {
length = size_t(nrd);
}
}
if (!result) {
*outTokenizer = new Tokenizer(filename, fileMap, buffer, ownBuffer, length);
}
}
close(fd);
}
return result;
}