mirror of
https://github.com/pytorch/pytorch.git
synced 2025-11-04 08:00:58 +08:00
ce94b212c7
Use our thread-safe getenv wrappers. Pull Request resolved: https://github.com/pytorch/pytorch/pull/140200 Approved by: https://github.com/kwen2501, https://github.com/eqy
99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
#include <c10/util/Exception.h>
|
|
#include <c10/util/env.h>
|
|
#include <fmt/format.h>
|
|
#include <cstdlib>
|
|
#include <mutex>
|
|
#include <shared_mutex>
|
|
|
|
namespace c10::utils {
|
|
|
|
static std::shared_mutex& get_env_mutex() {
|
|
static std::shared_mutex env_mutex;
|
|
return env_mutex;
|
|
}
|
|
|
|
// Set an environment variable.
|
|
void set_env(const char* name, const char* value, bool overwrite) {
|
|
std::lock_guard lk(get_env_mutex());
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable : 4996)
|
|
if (!overwrite) {
|
|
// NOLINTNEXTLINE(concurrency-mt-unsafe)
|
|
if (std::getenv(name) != nullptr) {
|
|
return;
|
|
}
|
|
}
|
|
auto full_env_variable = fmt::format("{}={}", name, value);
|
|
// NOLINTNEXTLINE(concurrency-mt-unsafe)
|
|
auto err = putenv(full_env_variable.c_str());
|
|
TORCH_INTERNAL_ASSERT(
|
|
err == 0,
|
|
"putenv failed for environment \"",
|
|
name,
|
|
"\", the error is: ",
|
|
err);
|
|
#pragma warning(pop)
|
|
#else
|
|
// NOLINTNEXTLINE(concurrency-mt-unsafe)
|
|
auto err = setenv(name, value, static_cast<int>(overwrite));
|
|
TORCH_INTERNAL_ASSERT(
|
|
err == 0,
|
|
"setenv failed for environment \"",
|
|
name,
|
|
"\", the error is: ",
|
|
err);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
// Reads an environment variable and returns the content if it is set
|
|
std::optional<std::string> get_env(const char* name) noexcept {
|
|
std::shared_lock lk(get_env_mutex());
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable : 4996)
|
|
#endif
|
|
// NOLINTNEXTLINE(concurrency-mt-unsafe)
|
|
auto envar = std::getenv(name);
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
if (envar != nullptr) {
|
|
return std::string(envar);
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
// Checks an environment variable is set.
|
|
bool has_env(const char* name) noexcept {
|
|
return get_env(name).has_value();
|
|
}
|
|
|
|
// Reads an environment variable and returns
|
|
// - optional<true>, if set equal to "1"
|
|
// - optional<false>, if set equal to "0"
|
|
// - nullopt, otherwise
|
|
//
|
|
// NB:
|
|
// Issues a warning if the value of the environment variable is not 0 or 1.
|
|
std::optional<bool> check_env(const char* name) {
|
|
auto env_opt = get_env(name);
|
|
if (env_opt.has_value()) {
|
|
if (env_opt == "0") {
|
|
return false;
|
|
}
|
|
if (env_opt == "1") {
|
|
return true;
|
|
}
|
|
TORCH_WARN(
|
|
"Ignoring invalid value for boolean flag ",
|
|
name,
|
|
": ",
|
|
*env_opt,
|
|
"valid values are 0 or 1.");
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
} // namespace c10::utils
|