mirror of
https://github.com/gabime/spdlog.git
synced 2024-12-25 18:11:33 +08:00
Fixed issue #546 by adding an "is_empty" method to the queue instead of the buggy approx_size
This commit is contained in:
parent
6fd5f3c866
commit
f5fe681a41
@ -384,7 +384,7 @@ inline void spdlog::details::async_log_helper::sleep_or_yield(const spdlog::log_
|
||||
inline void spdlog::details::async_log_helper::wait_empty_q()
|
||||
{
|
||||
auto last_op = details::os::now();
|
||||
while (_q.approx_size() > 0)
|
||||
while (!_q.is_empty())
|
||||
{
|
||||
sleep_or_yield(details::os::now(), last_op);
|
||||
}
|
||||
|
@ -50,22 +50,22 @@ Distributed under the MIT License (http://opensource.org/licenses/MIT)
|
||||
|
||||
namespace spdlog
|
||||
{
|
||||
namespace details
|
||||
{
|
||||
namespace details
|
||||
{
|
||||
|
||||
template<typename T>
|
||||
class mpmc_bounded_queue
|
||||
{
|
||||
public:
|
||||
template<typename T>
|
||||
class mpmc_bounded_queue
|
||||
{
|
||||
public:
|
||||
|
||||
using item_type = T;
|
||||
mpmc_bounded_queue(size_t buffer_size)
|
||||
:max_size_(buffer_size),
|
||||
buffer_(new cell_t [buffer_size]),
|
||||
buffer_(new cell_t[buffer_size]),
|
||||
buffer_mask_(buffer_size - 1)
|
||||
{
|
||||
//queue size must be power of two
|
||||
if(!((buffer_size >= 2) && ((buffer_size & (buffer_size - 1)) == 0)))
|
||||
if (!((buffer_size >= 2) && ((buffer_size & (buffer_size - 1)) == 0)))
|
||||
throw spdlog_ex("async logger queue size must be power of two");
|
||||
|
||||
for (size_t i = 0; i != buffer_size; i += 1)
|
||||
@ -76,7 +76,7 @@ public:
|
||||
|
||||
~mpmc_bounded_queue()
|
||||
{
|
||||
delete [] buffer_;
|
||||
delete[] buffer_;
|
||||
}
|
||||
|
||||
|
||||
@ -84,22 +84,18 @@ public:
|
||||
{
|
||||
cell_t* cell;
|
||||
size_t pos = enqueue_pos_.load(std::memory_order_relaxed);
|
||||
for (;;)
|
||||
{
|
||||
for (;;) {
|
||||
cell = &buffer_[pos & buffer_mask_];
|
||||
size_t seq = cell->sequence_.load(std::memory_order_acquire);
|
||||
intptr_t dif = static_cast<intptr_t>(seq) - static_cast<intptr_t>(pos);
|
||||
if (dif == 0)
|
||||
{
|
||||
if (dif == 0) {
|
||||
if (enqueue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
|
||||
break;
|
||||
}
|
||||
else if (dif < 0)
|
||||
{
|
||||
else if (dif < 0) {
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
else {
|
||||
pos = enqueue_pos_.load(std::memory_order_relaxed);
|
||||
}
|
||||
}
|
||||
@ -112,14 +108,12 @@ public:
|
||||
{
|
||||
cell_t* cell;
|
||||
size_t pos = dequeue_pos_.load(std::memory_order_relaxed);
|
||||
for (;;)
|
||||
{
|
||||
for (;;) {
|
||||
cell = &buffer_[pos & buffer_mask_];
|
||||
size_t seq =
|
||||
cell->sequence_.load(std::memory_order_acquire);
|
||||
intptr_t dif = static_cast<intptr_t>(seq) - static_cast<intptr_t>(pos + 1);
|
||||
if (dif == 0)
|
||||
{
|
||||
if (dif == 0) {
|
||||
if (dequeue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
|
||||
break;
|
||||
}
|
||||
@ -133,17 +127,19 @@ public:
|
||||
return true;
|
||||
}
|
||||
|
||||
size_t approx_size()
|
||||
bool is_empty()
|
||||
{
|
||||
size_t first_pos = dequeue_pos_.load(std::memory_order_relaxed);
|
||||
size_t last_pos = enqueue_pos_.load(std::memory_order_relaxed);
|
||||
if (last_pos <= first_pos)
|
||||
return 0;
|
||||
auto size = last_pos - first_pos;
|
||||
return size < max_size_ ? size : max_size_;
|
||||
unsigned front, front1, back;
|
||||
// try to take a consistent snapshot of front/tail.
|
||||
do {
|
||||
front = enqueue_pos_.load(std::memory_order_acquire);
|
||||
back = dequeue_pos_.load(std::memory_order_acquire);
|
||||
front1 = enqueue_pos_.load(std::memory_order_relaxed);
|
||||
} while (front != front1);
|
||||
return back == front;
|
||||
}
|
||||
|
||||
private:
|
||||
private:
|
||||
struct cell_t
|
||||
{
|
||||
std::atomic<size_t> sequence_;
|
||||
@ -153,7 +149,7 @@ private:
|
||||
size_t const max_size_;
|
||||
|
||||
static size_t const cacheline_size = 64;
|
||||
typedef char cacheline_pad_t [cacheline_size];
|
||||
typedef char cacheline_pad_t[cacheline_size];
|
||||
|
||||
cacheline_pad_t pad0_;
|
||||
cell_t* const buffer_;
|
||||
@ -166,7 +162,7 @@ private:
|
||||
|
||||
mpmc_bounded_queue(mpmc_bounded_queue const&) = delete;
|
||||
void operator= (mpmc_bounded_queue const&) = delete;
|
||||
};
|
||||
};
|
||||
|
||||
} // ns details
|
||||
} // ns details
|
||||
} // ns spdlog
|
||||
|
Loading…
Reference in New Issue
Block a user