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Fix #1215

This commit is contained in:
gabime 2019-09-07 20:11:58 +03:00
parent bd9e1475e2
commit 1857a44c7c
2 changed files with 16 additions and 8 deletions
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1
include/spdlog/common.h
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@ -4,6 +4,7 @@
#pragma once #pragma once
#include "spdlog/tweakme.h" #include "spdlog/tweakme.h"
#include "spdlog/details/null_mutex.h"
#include <atomic> #include <atomic>
#include <chrono> #include <chrono>

23
include/spdlog/details/null_mutex.h
View File

@ -4,15 +4,16 @@
#pragma once #pragma once
#include <atomic> #include <atomic>
#include <utility>
// null, no cost dummy "mutex" and dummy "atomic" int // null, no cost dummy "mutex" and dummy "atomic" int
namespace spdlog { namespace spdlog {
namespace details { namespace details {
struct null_mutex struct null_mutex
{ {
void lock() {} void lock() const {}
void unlock() {} void unlock() const {}
bool try_lock() bool try_lock() const
{ {
return true; return true;
} }
@ -23,18 +24,24 @@ struct null_atomic_int
int value; int value;
null_atomic_int() = default; null_atomic_int() = default;
explicit null_atomic_int(int val) explicit null_atomic_int(int new_value)
: value(val) : value(new_value)
{} {}
int load(std::memory_order) const int load(std::memory_order = std::memory_order_relaxed) const
{ {
return value; return value;
} }
void store(int val) void store(int new_value, std::memory_order = std::memory_order_relaxed)
{ {
value = val; value = new_value;
}
int exchange(int new_value, std::memory_order = std::memory_order_relaxed)
{
std::swap(new_value, value);
return new_value; // return value before the call
} }
}; };