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The only entry in the stat buf this code cares about is the size. Keep just

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the size, not the whole stat buffer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29171 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-07-18 07:01:08 +00:00
parent cca68faac2
commit 0af7093532
1 changed files with 14 additions and 14 deletions
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28
lib/System/Unix/MappedFile.inc
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@ -35,8 +35,8 @@ namespace llvm {
using namespace sys;
struct sys::MappedFileInfo {
int fd_;
struct stat sbuf_;
int FD;
off_t Size;
};
void MappedFile::initialize() {
@ -62,14 +62,14 @@ void MappedFile::initialize() {
ThrowErrno(std::string("Can't stat file: ") + path_.toString());
}
info_ = new MappedFileInfo;
info_->fd_ = FD;
info_->sbuf_ = sbuf;
info_->FD = FD;
info_->Size = sbuf.st_size;
}
void MappedFile::terminate() {
assert(info_ && "MappedFile not initialized");
if (info_->fd_ >= 0)
::close(info_->fd_);
if (info_->FD >= 0)
::close(info_->FD);
delete info_;
info_ = 0;
}
@ -78,8 +78,8 @@ void MappedFile::unmap() {
assert(info_ && "MappedFile not initialized");
if (isMapped()) {
if (options_ & WRITE_ACCESS)
::msync(base_, info_->sbuf_.st_size, MS_SYNC);
::munmap(base_, info_->sbuf_.st_size);
::msync(base_, info_->Size, MS_SYNC);
::munmap(base_, info_->Size);
}
}
@ -106,10 +106,10 @@ void* MappedFile::map() {
else
flags |= MAP_PRIVATE;
}
size_t map_size = ((info_->sbuf_.st_size / Process::GetPageSize())+1) *
size_t map_size = ((info_->Size / Process::GetPageSize())+1) *
Process::GetPageSize();
base_ = ::mmap(0, map_size, prot, flags, info_->fd_, 0);
base_ = ::mmap(0, map_size, prot, flags, info_->FD, 0);
if (base_ == MAP_FAILED)
ThrowErrno(std::string("Can't map file:") + path_.toString());
}
@ -118,7 +118,7 @@ void* MappedFile::map() {
size_t MappedFile::size() const {
assert(info_ && "MappedFile not initialized");
return info_->sbuf_.st_size;
return info_->Size;
}
void MappedFile::size(size_t new_size) {
@ -128,7 +128,7 @@ void MappedFile::size(size_t new_size) {
this->unmap();
// Adjust the current size to a page boundary
size_t cur_size = ((info_->sbuf_.st_size / Process::GetPageSize())+1) *
size_t cur_size = ((info_->Size / Process::GetPageSize())+1) *
Process::GetPageSize();
// Adjust the new_size to a page boundary
@ -139,8 +139,8 @@ void MappedFile::size(size_t new_size) {
if (new_size > cur_size) {
// Ensure we can allocate at least the idodes necessary to handle the
// file size requested.
::lseek(info_->fd_, new_size, SEEK_SET);
::write(info_->fd_, "\0", 1);
::lseek(info_->FD, new_size, SEEK_SET);
::write(info_->FD, "\0", 1);
}
// Seek to current end of file.