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Limit error handler rate to 1/sec

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gabime 2025-01-17 16:42:06 +02:00
parent af7b061773
commit be942e0a2d
2 changed files with 33 additions and 9 deletions
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14
include/spdlog/details/err_helper.h
View File

@ -4,18 +4,24 @@
#pragma once
#include <string>
#include <mutex>
#include <chrono>
#include <exception>
#include <mutex>
#include "spdlog/common.h"
// by default, prints the error to stderr, thread safe
// by default, prints the error to stderr, at max rate of 1/sec thread safe
namespace spdlog {
namespace details {
class SPDLOG_API err_helper {
err_handler custom_err_handler_;
std::chrono::steady_clock::time_point last_report_time_;
std::mutex mutex_;
public:
void handle_ex(const std::string& origin, const source_loc& loc, const std::exception& ex) const noexcept;
void handle_unknown_ex(const std::string& origin, const source_loc& loc) const noexcept;
err_helper() = default;
err_helper(const err_helper& other);
err_helper(err_helper&& other);
void handle_ex(const std::string& origin, const source_loc& loc, const std::exception& ex) noexcept;
void handle_unknown_ex(const std::string& origin, const source_loc& loc) noexcept;
void set_err_handler(err_handler handler);
};
} // namespace details

28
src/details/err_helper.cpp
View File

@ -3,20 +3,34 @@
#include "spdlog/details/err_helper.h"
#include "iostream"
#include "spdlog/details/os.h"
namespace spdlog {
namespace details {
err_helper::err_helper(const err_helper &other)
: custom_err_handler_(other.custom_err_handler_),
last_report_time_(other.last_report_time_) {}
err_helper::err_helper(err_helper &&other)
: custom_err_handler_(std::move(other.custom_err_handler_)),
last_report_time_(other.last_report_time_) {};
// Prints error to stderr with source location (if available). A stderr sink is not used because reaching
// this point might indicate a problem with the logging system itself so we use fputs() directly.
void err_helper::handle_ex(const std::string &origin, const source_loc &loc, const std::exception &ex) const noexcept {
void err_helper::handle_ex(const std::string &origin, const source_loc &loc, const std::exception &ex) noexcept {
std::lock_guard lock(mutex_);
try {
if (custom_err_handler_) {
custom_err_handler_(ex.what());
return;
}
const auto now = std::chrono::steady_clock::now();
if (now - last_report_time_ < std::chrono::seconds(1)) {
return;
}
last_report_time_ = now;
const auto tm_time = os::localtime();
char date_buf[32];
std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
@ -29,17 +43,21 @@ void err_helper::handle_ex(const std::string &origin, const source_loc &loc, con
}
std::fputs(msg.c_str(), stderr);
} catch (const std::exception &handler_ex) {
std::fprintf(stderr, "[*** LOG ERROR ***] [%s] caught exception during error handler: %s\n", origin.c_str(), handler_ex.what());
std::fprintf(stderr, "[*** LOG ERROR ***] [%s] caught exception during error handler: %s\n", origin.c_str(),
handler_ex.what());
} catch (...) { // catch all exceptions
std::fprintf(stderr, "[*** LOG ERROR ***] [%s] caught unknown exception during error handler\n", origin.c_str());
}
}
void err_helper::handle_unknown_ex(const std::string &origin, const source_loc &loc) const noexcept {
void err_helper::handle_unknown_ex(const std::string &origin, const source_loc &loc) noexcept {
handle_ex(origin, loc, std::runtime_error("unknown exception"));
}
void err_helper::set_err_handler(err_handler handler) { custom_err_handler_ = std::move(handler); }
void err_helper::set_err_handler(err_handler handler) {
std::lock_guard lock(mutex_);
custom_err_handler_ = std::move(handler);
}
} // namespace details
} // namespace spdlog