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gabime 2018-07-10 23:51:20 +03:00
parent d5468e50f6
commit d409e5367b
1 changed files with 170 additions and 169 deletions
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339
include/spdlog/details/thread_pool.h
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@ -10,209 +10,210 @@
#include <vector>
namespace spdlog {
namespace details {
namespace details {
using async_logger_ptr = std::shared_ptr<spdlog::async_logger>;
using async_logger_ptr = std::shared_ptr<spdlog::async_logger>;
enum class async_msg_type
{
log,
flush,
terminate
};
enum class async_msg_type
{
log,
flush,
terminate
};
// Async msg to move to/from the queue
// Movable only. should never be copied
struct async_msg
{
async_msg_type msg_type;
level::level_enum level;
log_clock::time_point time;
size_t thread_id;
fmt::basic_memory_buffer<char, 176> raw;
size_t msg_id;
async_logger_ptr worker_ptr;
struct async_msg
{
async_msg_type msg_type;
level::level_enum level;
log_clock::time_point time;
size_t thread_id;
fmt::basic_memory_buffer<char, 176> raw;
async_msg() = default;
~async_msg() = default;
size_t msg_id;
async_logger_ptr worker_ptr;
// should only be moved in or out of the queue..
async_msg(const async_msg &) = delete;
async_msg() = default;
~async_msg() = default;
async_msg(async_msg &&other) SPDLOG_NOEXCEPT : msg_type(other.msg_type),
// should only be moved in or out of the queue..
async_msg(const async_msg &) = delete;
#if defined(_MSC_VER) && _MSC_VER <= 1800 // support for vs2013 move
async_msg(async_msg &&other) SPDLOG_NOEXCEPT : msg_type(other.msg_type),
level(other.level),
time(other.time),
thread_id(other.thread_id),
thread_id(other.thread_id),
raw(move(other.raw)),
msg_id(other.msg_id),
worker_ptr(std::move(other.worker_ptr))
{
fmt_helper::append_buf(other.raw, raw);
other.raw.resize(0);
}
async_msg &operator=(async_msg &&other) SPDLOG_NOEXCEPT
{
if (this == &other)
return *this;
msg_type = other.msg_type;
level = other.level;
time = other.time;
thread_id = other.thread_id;
raw.resize(0);
fmt_helper::append_buf(other.raw, raw);
thread_id = other.thread_id;
raw = std::move(other.raw);
msg_id = other.msg_id;
worker_ptr = std::move(other.worker_ptr);
return *this;
return *this;
}
#else
async_msg(async_msg &&other) = default;
async_msg &operator=(async_msg &&other) = default;
#endif
// construct from log_msg with given type
async_msg(async_logger_ptr &&worker, async_msg_type the_type, details::log_msg &&m)
: msg_type(the_type)
, level(m.level)
, time(m.time)
, thread_id(m.thread_id)
, msg_id(m.msg_id)
, worker_ptr(std::forward<async_logger_ptr>(worker))
{
fmt_helper::append_buf(m.raw, raw);
}
async_msg(async_logger_ptr &&worker, async_msg_type the_type)
: async_msg(std::forward<async_logger_ptr>(worker), the_type, details::log_msg())
{
}
async_msg(async_msg_type the_type)
: async_msg(nullptr, the_type, details::log_msg())
{
}
// copy into log_msg
void to_log_msg(log_msg &msg)
{
msg.logger_name = &worker_ptr->name();
msg.level = level;
msg.time = time;
msg.thread_id = thread_id;
fmt_helper::append_buf(raw, msg.raw);
msg.msg_id = msg_id;
msg.color_range_start = 0;
msg.color_range_end = 0;
}
};
class thread_pool
{
public:
using item_type = async_msg;
using q_type = details::mpmc_blocking_queue<item_type>;
using clock_type = std::chrono::steady_clock;
thread_pool(size_t q_max_items, size_t threads_n)
: q_(q_max_items)
{
// std::cout << "thread_pool() q_size_bytes: " << q_size_bytes << "\tthreads_n: " << threads_n << std::endl;
if (threads_n == 0 || threads_n > 1000)
{
throw spdlog_ex("spdlog::thread_pool(): invalid threads_n param (valid range is 1-1000)");
}
for (size_t i = 0; i < threads_n; i++)
{
threads_.emplace_back(std::bind(&thread_pool::worker_loop_, this));
}
}
// message all threads to terminate gracefully join them
~thread_pool()
{
try
{
for (size_t i = 0; i < threads_.size(); i++)
// construct from log_msg with given type
async_msg(async_logger_ptr &&worker, async_msg_type the_type, details::log_msg &&m)
: msg_type(the_type)
, level(m.level)
, time(m.time)
, thread_id(m.thread_id)
, msg_id(m.msg_id)
, worker_ptr(std::forward<async_logger_ptr>(worker))
{
post_async_msg_(async_msg(async_msg_type::terminate), async_overflow_policy::block);
fmt_helper::append_buf(m.raw, raw);
}
for (auto &t : threads_)
async_msg(async_logger_ptr &&worker, async_msg_type the_type)
: async_msg(std::forward<async_logger_ptr>(worker), the_type, details::log_msg())
{
t.join();
}
}
catch (...)
{
}
}
void post_log(async_logger_ptr &&worker_ptr, details::log_msg &&msg, async_overflow_policy overflow_policy)
{
async_msg async_m(std::forward<async_logger_ptr>(worker_ptr), async_msg_type::log, std::forward<log_msg>(msg));
post_async_msg_(std::move(async_m), overflow_policy);
}
async_msg(async_msg_type the_type)
: async_msg(nullptr, the_type, details::log_msg())
{
}
void post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy)
{
post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
}
private:
q_type q_;
std::vector<std::thread> threads_;
void post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy)
{
if (overflow_policy == async_overflow_policy::block)
{
q_.enqueue(std::move(new_msg));
}
else
{
q_.enqueue_nowait(std::move(new_msg));
}
}
void worker_loop_()
{
while (process_next_msg_())
{
// copy into log_msg
void to_log_msg(log_msg &msg)
{
msg.logger_name = &worker_ptr->name();
msg.level = level;
msg.time = time;
msg.thread_id = thread_id;
fmt_helper::append_buf(raw, msg.raw);
msg.msg_id = msg_id;
msg.color_range_start = 0;
msg.color_range_end = 0;
}
};
}
// process next message in the queue
// return true if this thread should still be active (while no terminate msg was received)
bool process_next_msg_()
{
async_msg incoming_async_msg;
bool dequeued = q_.dequeue_for(incoming_async_msg, std::chrono::seconds(10));
if (!dequeued)
class thread_pool
{
return true;
}
public:
using item_type = async_msg;
using q_type = details::mpmc_blocking_queue<item_type>;
using clock_type = std::chrono::steady_clock;
switch (incoming_async_msg.msg_type)
{
case async_msg_type::flush:
{
incoming_async_msg.worker_ptr->backend_flush_();
return true;
}
thread_pool(size_t q_max_items, size_t threads_n)
: q_(q_max_items)
{
// std::cout << "thread_pool() q_size_bytes: " << q_size_bytes << "\tthreads_n: " << threads_n << std::endl;
if (threads_n == 0 || threads_n > 1000)
{
throw spdlog_ex("spdlog::thread_pool(): invalid threads_n param (valid range is 1-1000)");
}
for (size_t i = 0; i < threads_n; i++)
{
threads_.emplace_back(std::bind(&thread_pool::worker_loop_, this));
}
}
case async_msg_type::terminate:
{
return false;
}
// message all threads to terminate gracefully join them
~thread_pool()
{
try
{
for (size_t i = 0; i < threads_.size(); i++)
{
post_async_msg_(async_msg(async_msg_type::terminate), async_overflow_policy::block);
}
default:
{
log_msg msg;
incoming_async_msg.to_log_msg(msg);
incoming_async_msg.worker_ptr->backend_log_(msg);
return true;
}
}
assert(false);
return true; // should not be reached
}
};
for (auto &t : threads_)
{
t.join();
}
}
catch (...)
{
}
}
} // namespace details
} // namespace spdlog
void post_log(async_logger_ptr &&worker_ptr, details::log_msg &&msg, async_overflow_policy overflow_policy)
{
async_msg async_m(std::forward<async_logger_ptr>(worker_ptr), async_msg_type::log, std::forward<log_msg>(msg));
post_async_msg_(std::move(async_m), overflow_policy);
}
void post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy)
{
post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
}
private:
q_type q_;
std::vector<std::thread> threads_;
void post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy)
{
if (overflow_policy == async_overflow_policy::block)
{
q_.enqueue(std::move(new_msg));
}
else
{
q_.enqueue_nowait(std::move(new_msg));
}
}
void worker_loop_()
{
while (process_next_msg_())
{
};
}
// process next message in the queue
// return true if this thread should still be active (while no terminate msg was received)
bool process_next_msg_()
{
async_msg incoming_async_msg;
bool dequeued = q_.dequeue_for(incoming_async_msg, std::chrono::seconds(10));
if (!dequeued)
{
return true;
}
switch (incoming_async_msg.msg_type)
{
case async_msg_type::flush:
{
incoming_async_msg.worker_ptr->backend_flush_();
return true;
}
case async_msg_type::terminate:
{
return false;
}
default:
{
log_msg msg;
incoming_async_msg.to_log_msg(msg);
incoming_async_msg.worker_ptr->backend_log_(msg);
return true;
}
}
assert(false);
return true; // should not be reached
}
};
} // namespace details
} // namespace spdlog