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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
#pragma once
#include <config.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h> // for FILE, stdout
#include <string.h> // for memcpy
#include <charconv>
#include <chrono>
#include <ratio> // for micro
#include <string>
#include <glib.h> // for g_get_monotonic_time
#include <mozilla/Result.h>
#include <mozilla/ResultVariant.h> // IWYU pragma: keep
#ifdef G_DISABLE_ASSERT
# define GJS_USED_ASSERT [[maybe_unused]]
#else
# define GJS_USED_ASSERT
#endif
bool gjs_environment_variable_is_set(const char* env_variable_name);
char** gjs_g_strv_concat(const char** strv_array[], int len);
/**
* LogFile:
*
* RAII class encapsulating access to a FILE* pointer that must be closed,
* unless it is an already-open fallback file such as stdout or stderr.
*/
class LogFile {
FILE* m_fp;
const char* m_errmsg = nullptr;
bool m_should_close : 1;
public:
LogFile(const LogFile&) = delete;
LogFile& operator=(const LogFile&) = delete;
explicit LogFile(const char* filename, FILE* fallback_fp = stdout)
: m_should_close(false) {
if (filename) {
m_fp = fopen(filename, "a");
if (!m_fp)
m_errmsg = strerror(errno);
else
m_should_close = true;
} else {
m_fp = fallback_fp;
}
}
~LogFile() {
if (m_should_close)
fclose(m_fp);
}
FILE* fp() { return m_fp; }
bool has_error() { return !!m_errmsg; }
const char* errmsg() { return m_errmsg; }
};
namespace Gjs {
class StatmParseError {
std::string m_message;
public:
// NOLINTNEXTLINE(runtime/explicit) - explicit ctor won't work with Err()
StatmParseError(const char* message) : m_message(message) {}
StatmParseError(const char* message, std::from_chars_result result);
explicit operator std::string() const { return m_message; }
};
using StatmParseResult = mozilla::Result<uint64_t, StatmParseError>;
StatmParseResult parse_statm_file_rss(const char* file_contents);
} // namespace Gjs
namespace GLib {
// GLib monotonic clock interface for std::chrono
struct MonotonicClock {
using rep = int64_t;
using period = std::micro;
using duration = std::chrono::microseconds;
using time_point = std::chrono::time_point<MonotonicClock>;
static constexpr const bool is_steady = true;
[[nodiscard]]
static time_point now() {
return time_point{duration{g_get_monotonic_time()}};
}
};
using MonotonicTime = MonotonicClock::time_point;
} // namespace GLib
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