This source file includes following definitions.
- length_
- MapFileToMemory
- CloseHandles
#include "base/files/memory_mapped_file.h"
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include "base/logging.h"
#include "base/threading/thread_restrictions.h"
namespace base {
MemoryMappedFile::MemoryMappedFile() : data_(NULL), length_(0) {
}
bool MemoryMappedFile::MapFileToMemory() {
ThreadRestrictions::AssertIOAllowed();
struct stat file_stat;
if (fstat(file_.GetPlatformFile(), &file_stat) == -1 ) {
DPLOG(ERROR) << "fstat " << file_.GetPlatformFile();
return false;
}
length_ = file_stat.st_size;
data_ = static_cast<uint8*>(
mmap(NULL, length_, PROT_READ, MAP_SHARED, file_.GetPlatformFile(), 0));
if (data_ == MAP_FAILED)
DPLOG(ERROR) << "mmap " << file_.GetPlatformFile();
return data_ != MAP_FAILED;
}
void MemoryMappedFile::CloseHandles() {
ThreadRestrictions::AssertIOAllowed();
if (data_ != NULL)
munmap(data_, length_);
file_.Close();
data_ = NULL;
length_ = 0;
}
}