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created async_sink.cpp and updated example

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pull/3309/head
gabime 9 months ago
parent 80d8186644
commit 8643c66b6e
4 changed files with 133 additions and 80 deletions
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6
CMakeLists.txt
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@ -181,7 +181,8 @@ set(SPDLOG_HEADERS
"include/spdlog/sinks/syslog_sink.h"
"include/spdlog/sinks/systemd_sink.h"
"include/spdlog/sinks/tcp_sink.h"
"include/spdlog/sinks/udp_sink.h")
"include/spdlog/sinks/udp_sink.h"
"include/spdlog/sinks/async_sink.h")
set(SPDLOG_SRCS
"src/common.cpp"
@ -196,7 +197,8 @@ set(SPDLOG_SRCS
"src/sinks/base_sink.cpp"
"src/sinks/basic_file_sink.cpp"
"src/sinks/rotating_file_sink.cpp"
"src/sinks/stdout_sinks.cpp")
"src/sinks/stdout_sinks.cpp"
"src/sinks/async_sink.cpp")
if(WIN32)
list(APPEND SPDLOG_SRCS

7
example/example.cpp
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@ -119,12 +119,11 @@ void callback_example() {
#include "spdlog/sinks/async_sink.h"
void async_example() {
auto async_sink = std::make_shared<async_sink_mt>();
auto logger = spdlog::create_async("some_logger");
auto file_sink = std::make_shared<basic_file_sink_mt>("logs/async_log.txt", true);
async_sink->add_sink(std::move(file_sink));
spdlog::logger logger("async_logger", async_sink);
logger->sinks().push_back(file_sink);
for (int i = 1; i < 101; ++i) {
logger.info("Async message #{}", i);
logger->info("Async message #{}", i);
}
}

92
include/spdlog/sinks/async_sink.h
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@ -3,7 +3,6 @@
#include <cstdint>
#include <thread>
#include <atomic>
#include <cassert>
#include <functional>
#include "../details/async_log_msg.h"
@ -32,33 +31,12 @@ public:
discard_new // Discard the log message if the queue is full
};
async_sink(size_t queue_size, std::function<void()> on_thread_start, std::function<void()> on_thread_stop) {
if (queue_size == 0 || queue_size > max_queue_size) {
throw spdlog_ex("async_sink: invalid queue size");
}
// printf("........... Allocating queue: slot: %zu X %zu bytes ====> %lld KB ..............\n",
// queue_size, sizeof(details::async_log_msg), (sizeof(details::async_log_msg) * queue_size)/1024);
q_ = std::make_unique<queue_t>(queue_size);
worker_thread_ = std::thread([this, on_thread_start, on_thread_stop] {
if (on_thread_start) on_thread_start();
this->worker_loop();
if (on_thread_stop) on_thread_stop();
});
}
~async_sink() override {
try {
q_->enqueue(async_log_msg(async_log_msg::type::terminate));
worker_thread_.join();
} catch (...) {
}
};
async_sink(): async_sink(default_queue_size, nullptr, nullptr) {}
explicit async_sink(size_t queue_size): async_sink(queue_size, nullptr, nullptr) {}
async_sink(std::function<void()> on_thread_start, std::function<void()> on_thread_stop):
async_sink(default_queue_size, on_thread_start, on_thread_stop) {}
async_sink(size_t queue_size, std::function<void()> on_thread_start, std::function<void()> on_thread_stop);
~async_sink() override;
async_sink();
explicit async_sink(size_t queue_size);
async_sink(std::function<void()> on_thread_start, std::function<void()> on_thread_stop);
async_sink(const async_sink &) = delete;
async_sink &operator=(const async_sink &) = delete;
async_sink(async_sink &&) = default;
@ -68,57 +46,16 @@ public:
[[nodiscard]] overflow_policy get_overflow_policy() const { return overflow_policy_; }
[[nodiscard]] size_t get_overrun_counter() const { return q_->overrun_counter(); }
void reset_overrun_counter() { q_->reset_overrun_counter(); }
void reset_overrun_counter() const { q_->reset_overrun_counter(); }
[[nodiscard]] size_t get_discard_counter() const { return q_->discard_counter(); }
void reset_discard_counter() { q_->reset_discard_counter(); }
void reset_discard_counter() const { q_->reset_discard_counter(); }
private:
void sink_it_(const details::log_msg &msg) override {
send_message_(async_log_msg::type::log, msg);
}
void flush_() override {
send_message_(async_log_msg::type::flush, details::log_msg());
}
// asynchronously send the log message to the worker thread using the queue.
// take into account the configured overflow policy.
void send_message_(const async_log_msg::type msg_type, const details::log_msg &msg) {
switch (overflow_policy_) {
case overflow_policy::block:
q_->enqueue(async_log_msg(msg_type, msg));
break;
case overflow_policy::overrun_oldest:
q_->enqueue_nowait(async_log_msg(msg_type, msg));
break;
case overflow_policy::discard_new:
q_->enqueue_if_have_room(async_log_msg(msg_type, msg));
break;
default:
assert(false);
throw spdlog_ex("async_sink: invalid overflow policy");
}
}
void worker_loop () {
details::async_log_msg incoming_msg;
for (;;) {
q_->dequeue(incoming_msg);
switch (incoming_msg.message_type()) {
case async_log_msg::type::log:
base_t::sink_it_(incoming_msg);
break;
case async_log_msg::type::flush:
base_t::flush_();
break;
case async_log_msg::type::terminate:
return;
default:
assert(false);
}
}
}
void sink_it_(const details::log_msg &msg) override;
void flush_() override;
void send_message_(const async_log_msg::type msg_type, const details::log_msg &msg);
void worker_loop();
std::atomic<overflow_policy> overflow_policy_ = overflow_policy::block;
std::unique_ptr<queue_t> q_;
@ -129,4 +66,11 @@ using async_sink_mt = async_sink<std::mutex>;
using async_sink_st = async_sink<details::null_mutex>;
} // namespace sinks
class logger;
template <typename... SinkArgs>
std::shared_ptr<logger> create_async(std::string logger_name, SinkArgs &&...sink_args) {
auto async_sink = std::make_shared<sinks::async_sink_mt>(std::forward<SinkArgs>(sink_args)...);
return std::make_shared<logger>(std::move(logger_name), std::move(async_sink));
}
} // namespace spdlog

108
src/sinks/async_sink.cpp
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@ -0,0 +1,108 @@
// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#include "spdlog/sinks/async_sink.h"
#include <memory>
#include <mutex>
#include <cassert>
#include "spdlog/common.h"
#include "spdlog/pattern_formatter.h"
namespace spdlog {
namespace sinks {
template <typename Mutex>
async_sink<Mutex>::async_sink(size_t queue_size, std::function<void()> on_thread_start, std::function<void()> on_thread_stop)
: base_t() {
if (queue_size == 0 || queue_size > max_queue_size) {
throw spdlog_ex("async_sink: invalid queue size");
}
// printf("........... Allocating queue: slot: %zu X %zu bytes ====> %lld KB ..............\n",
// queue_size, sizeof(details::async_log_msg), (sizeof(details::async_log_msg) * queue_size)/1024);
q_ = std::make_unique<queue_t>(queue_size);
worker_thread_ = std::thread([this, on_thread_start, on_thread_stop] {
if (on_thread_start) on_thread_start();
this->worker_loop();
if (on_thread_stop) on_thread_stop();
});
}
template <typename Mutex>
async_sink<Mutex>::~async_sink() {
try {
q_->enqueue(async_log_msg(async_log_msg::type::terminate));
worker_thread_.join();
} catch (...) {
}
};
template <typename Mutex>
async_sink<Mutex>::async_sink()
: async_sink(default_queue_size, nullptr, nullptr) {}
template <typename Mutex>
async_sink<Mutex>::async_sink(size_t queue_size)
: async_sink(queue_size, nullptr, nullptr) {}
template <typename Mutex>
async_sink<Mutex>::async_sink(std::function<void()> on_thread_start, std::function<void()> on_thread_stop)
: async_sink(default_queue_size, on_thread_start, on_thread_stop) {}
template <typename Mutex>
void async_sink<Mutex>::sink_it_(const details::log_msg &msg) {
send_message_(async_log_msg::type::log, msg);
}
template <typename Mutex>
void async_sink<Mutex>::flush_() {
send_message_(async_log_msg::type::flush, details::log_msg());
}
template <typename Mutex>
void async_sink<Mutex>::send_message_(const async_log_msg::type msg_type, const details::log_msg &msg) {
switch (overflow_policy_) {
case overflow_policy::block:
q_->enqueue(async_log_msg(msg_type, msg));
break;
case overflow_policy::overrun_oldest:
q_->enqueue_nowait(async_log_msg(msg_type, msg));
break;
case overflow_policy::discard_new:
q_->enqueue_if_have_room(async_log_msg(msg_type, msg));
break;
default:
assert(false);
throw spdlog_ex("async_sink: invalid overflow policy");
}
}
template <typename Mutex>
void async_sink<Mutex>::worker_loop() {
details::async_log_msg incoming_msg;
for (;;) {
q_->dequeue(incoming_msg);
switch (incoming_msg.message_type()) {
case async_log_msg::type::log:
base_t::sink_it_(incoming_msg);
break;
case async_log_msg::type::flush:
base_t::flush_();
break;
case async_log_msg::type::terminate:
return;
default:
assert(false);
}
}
}
} // namespace sinks
} // namespace spdlog
// template instantiations
#include "spdlog/details/null_mutex.h"
template class SPDLOG_API spdlog::sinks::async_sink<std::mutex>;
template class SPDLOG_API spdlog::sinks::async_sink<spdlog::details::null_mutex>;
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