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#pragma once
#include <c10/macros/Export.h>
#include <optional>
#include <string>
#include <string_view>
#include <utility>
namespace c10 {
struct C10_API TempFile {
TempFile(std::string_view name, int fd = -1) noexcept : fd(fd), name(name) {}
TempFile(const TempFile&) = delete;
TempFile(TempFile&& other) noexcept
: fd(other.fd), name(std::move(other.name)) {
other.fd = -1;
}
TempFile& operator=(const TempFile&) = delete;
TempFile& operator=(TempFile&& other) noexcept {
fd = other.fd;
name = std::move(other.name);
other.fd = -1;
return *this;
}
#if defined(_WIN32)
bool open();
#endif
~TempFile();
int fd;
std::string name;
};
struct C10_API TempDir {
TempDir() = delete;
explicit TempDir(std::string_view name) noexcept : name(name) {}
TempDir(const TempDir&) = delete;
TempDir(TempDir&& other) noexcept : name(std::move(other.name)) {
other.name.clear();
}
TempDir& operator=(const TempDir&) = delete;
TempDir& operator=(TempDir&& other) noexcept {
name = std::move(other.name);
return *this;
}
~TempDir();
std::string name;
};
/// Attempts to return a temporary file or returns `nullopt` if an error
/// occurred.
///
/// The file returned follows the pattern
/// `<tmp-dir>/<name-prefix><random-pattern>`, where `<tmp-dir>` is the value of
/// the `"TMPDIR"`, `"TMP"`, `"TEMP"` or
/// `"TEMPDIR"` environment variable if any is set, or otherwise `/tmp`;
/// `<name-prefix>` is the value supplied to this function, and
/// `<random-pattern>` is a random sequence of numbers.
/// On Windows, `name_prefix` is ignored and `tmpnam_s` is used,
/// and no temporary file is opened.
C10_API std::optional<TempFile> try_make_tempfile(
std::string_view name_prefix = "torch-file-");
/// Like `try_make_tempfile`, but throws an exception if a temporary file could
/// not be returned.
C10_API TempFile make_tempfile(std::string_view name_prefix = "torch-file-");
/// Attempts to return a temporary directory or returns `nullopt` if an error
/// occurred.
///
/// The directory returned follows the pattern
/// `<tmp-dir>/<name-prefix><random-pattern>/`, where `<tmp-dir>` is the value
/// of the `"TMPDIR"`, `"TMP"`, `"TEMP"` or
/// `"TEMPDIR"` environment variable if any is set, or otherwise `/tmp`;
/// `<name-prefix>` is the value supplied to this function, and
/// `<random-pattern>` is a random sequence of numbers.
/// On Windows, `name_prefix` is ignored.
C10_API std::optional<TempDir> try_make_tempdir(
std::string_view name_prefix = "torch-dir-");
/// Like `try_make_tempdir`, but throws an exception if a temporary directory
/// could not be returned.
C10_API TempDir make_tempdir(std::string_view name_prefix = "torch-dir-");
} // namespace c10
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