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Add disk_space() to llvm::fs

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Summary: Adapted from Boost::filesystem.
(This is a reapply by reverting commit r265062 and fixing the WinAPI part)

Differential Revision: http://reviews.llvm.org/D18467

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mehdi Amini 2016-03-31 23:05:26 +00:00
parent 87cbc4fde1
commit f5e9ba6d1c
3 changed files with 56 additions and 1 deletions
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12
include/llvm/Support/FileSystem.h
View File

@ -32,6 +32,7 @@
#include "llvm/ADT/Twine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/TimeValue.h"
#include <ctime>
#include <iterator>
@ -648,6 +649,17 @@ std::error_code identify_magic(const Twine &path, file_magic &result);
std::error_code getUniqueID(const Twine Path, UniqueID &Result);
/// @brief Get disk space usage information.
///
/// Note: Users must be careful about "Time Of Check, Time Of Use" kind of bug.
/// Note: Windows reports results according to the quota allocated to the user.
///
/// @param Path Input path.
/// @returns a space_info structure filled with the capacity, free, and
/// available space on the device \a Path is on. A platform specific error_code
/// is returned on error.
ErrorOr<space_info> disk_space(const Twine Path);
/// This class represents a memory mapped file. It is based on
/// boost::iostreams::mapped_file.
class mapped_file_region {

32
lib/Support/Unix/Path.inc
View File

@ -60,6 +60,24 @@
# define PATH_MAX 4096
#endif
#include <sys/types.h>
#if !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__ANDROID__)
#include <sys/statvfs.h>
#define STATVFS statvfs
#define STATVFS_F_FRSIZE(vfs) vfs.f_frsize
#else
#ifdef __OpenBSD__
#include <sys/param.h>
#elif defined(__ANDROID__)
#include <sys/vfs.h>
#else
#include <sys/mount.h>
#endif
#define STATVFS statfs
#define STATVFS_F_FRSIZE(vfs) static_cast<uint64_t>(vfs.f_bsize)
#endif
using namespace llvm;
namespace llvm {
@ -70,7 +88,7 @@ namespace fs {
defined(__linux__) || defined(__CYGWIN__) || defined(__DragonFly__)
static int
test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
{
{
struct stat sb;
char fullpath[PATH_MAX];
@ -190,6 +208,18 @@ UniqueID file_status::getUniqueID() const {
return UniqueID(fs_st_dev, fs_st_ino);
}
ErrorOr<space_info> disk_space(const Twine Path) {
struct STATVFS Vfs;
if (::STATVFS(Path.str().c_str(), &Vfs))
return std::error_code(errno, std::generic_category());
auto FrSize = STATVFS_F_FRSIZE(Vfs);
space_info SpaceInfo;
SpaceInfo.capacity = static_cast<uint64_t>(Vfs.f_blocks) * FrSize;
SpaceInfo.free = static_cast<uint64_t>(Vfs.f_bfree) * FrSize;
SpaceInfo.available = static_cast<uint64_t>(Vfs.f_bavail) * FrSize;
return SpaceInfo;
}
std::error_code current_path(SmallVectorImpl<char> &result) {
result.clear();

13
lib/Support/Windows/Path.inc
View File

@ -151,6 +151,19 @@ UniqueID file_status::getUniqueID() const {
return UniqueID(VolumeSerialNumber, FileID);
}
ErrorOr<space_info> disk_space(const Twine Path) {
PULARGE_INTEGER Avail, Total, Free;
if (!::GetDiskFreeSpaceExA(Path.str().c_str(), &Avail, &Total, &Free))
return mapWindowsError(::GetLastError());
space_info SpaceInfo;
SpaceInfo.capacity =
(static_cast<uint64_t>(Total.HighPart) << 32) + Total.LowPart;
SpaceInfo.Free = (static_cast<uint64_t>(Free.HighPart) << 32) + Free.LowPart;
SpaceInfo.available =
(static_cast<uint64_t>(Avail.HighPart) << 32) + Avail.LowPart;
return SpaceInfo;
}
TimeValue file_status::getLastAccessedTime() const {
ULARGE_INTEGER UI;
UI.LowPart = LastAccessedTimeLow;