Add disk_space() to llvm::fs
Summary: Adapted from Boost::filesystem.
(This is a reapply by reverting commit r265080 and fixing the WinAPI part)
Differential Revision: http://reviews.llvm.org/D18467
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 265082
diff --git a/llvm/include/llvm/Support/FileSystem.h b/llvm/include/llvm/Support/FileSystem.h
index 4a4c3f4..3d78023 100644
--- a/llvm/include/llvm/Support/FileSystem.h
+++ b/llvm/include/llvm/Support/FileSystem.h
@@ -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 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 {
diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index a80e0dd..3cedf64 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -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 @@
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 @@
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();
diff --git a/llvm/lib/Support/Windows/Path.inc b/llvm/lib/Support/Windows/Path.inc
index 98fd7b0..068ed35 100644
--- a/llvm/lib/Support/Windows/Path.inc
+++ b/llvm/lib/Support/Windows/Path.inc
@@ -151,6 +151,19 @@
return UniqueID(VolumeSerialNumber, FileID);
}
+ErrorOr<space_info> disk_space(const Twine &Path) {
+ ULARGE_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;