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Replace std::lock_guard and std::lock with std::scoped_lock (#1758)

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std::scoped_lock was introduced in C++17 and is strictly better than
std::lock_guard as it supports locking any number of mutexes safely.
It's also easier to use than std::lock for locking multiple mutexes at
once.
This commit is contained in:
Tyler Veness
2019-07-08 22:58:39 -07:00
committed by Peter Johnson
parent 24d31df55a
commit 62be0392b6
79 changed files with 472 additions and 476 deletions
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18
wpiutil/src/test/native/cpp/spinlock_bench.cpp
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@@ -35,7 +35,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 10000000; i++) {
std::lock_guard lock(std_mutex);
std::scoped_lock lock(std_mutex);
++value;
}
auto stop = high_resolution_clock::now();
@@ -49,7 +49,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(std_mutex);
std::scoped_lock lock(std_mutex);
++value;
}
auto stop = high_resolution_clock::now();
@@ -64,7 +64,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(std_recursive_mutex);
std::scoped_lock lock(std_recursive_mutex);
++value;
}
auto stop = high_resolution_clock::now();
@@ -79,7 +79,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(wpi_mutex);
std::scoped_lock lock(wpi_mutex);
++value;
}
auto stop = high_resolution_clock::now();
@@ -94,7 +94,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(wpi_recursive_mutex);
std::scoped_lock lock(wpi_recursive_mutex);
++value;
}
auto stop = high_resolution_clock::now();
@@ -109,7 +109,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(spinlock);
std::scoped_lock lock(spinlock);
++value;
}
auto stop = high_resolution_clock::now();
@@ -124,7 +124,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(recursive_spinlock1);
std::scoped_lock lock(recursive_spinlock1);
++value;
}
auto stop = high_resolution_clock::now();
@@ -139,7 +139,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(recursive_spinlock2);
std::scoped_lock lock(recursive_spinlock2);
++value;
}
auto stop = high_resolution_clock::now();
@@ -154,7 +154,7 @@ TEST(SpinlockTest, Benchmark) {
auto start = high_resolution_clock::now();
for (int i = 0; i < 1000000; i++) {
std::lock_guard lock(recursive_spinlock);
std::scoped_lock lock(recursive_spinlock);
++value;
}
auto stop = high_resolution_clock::now();