/*
- * Copyright 2017 Facebook, Inc.
+ * Copyright 2011-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* // If the db insertion that follows fails, we should
* // remove it from memory.
- * // (You could also declare this as "auto guard = makeGuard(...)")
- * ScopeGuard guard = makeGuard([&] { friends_.pop_back(); });
+ * auto guard = makeGuard([&] { friends_.pop_back(); });
*
* // this will throw an exception upon error, which
* // makes the ScopeGuard execute UserCont::pop_back()
// Always close fd and unmap in case of failure along the way to avoid
// check failure above if we leave fd != -1 and the object is recycled
// like it is inside SignalSafeElfCache
- ScopeGuard guard = makeGuard([&] { reset(); });
+ auto guard = makeGuard([&] { reset(); });
struct stat st;
int r = fstat(fd_, &st);
if (r == -1) {
/*
- * Copyright 2017 Facebook, Inc.
+ * Copyright 2011-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <folly/portability/GTest.h>
-using folly::ScopeGuard;
using folly::makeGuard;
using std::vector;
{
// There is implicit conversion from func pointer
// double (*)() to function<void()>.
- ScopeGuard g = makeGuard(returnsDouble);
+ auto g = makeGuard(returnsDouble);
(void)g;
}
v.push_back(1);
{
// binding to member function.
- ScopeGuard g = makeGuard(std::bind(&vector<int>::pop_back, &v));
+ auto g = makeGuard(std::bind(&vector<int>::pop_back, &v));
(void)g;
}
EXPECT_EQ(0, v.size());
{
// bind member function with args. v is passed-by-value!
- ScopeGuard g = makeGuard(std::bind(push_back, v, 2));
+ auto g = makeGuard(std::bind(push_back, v, 2));
(void)g;
}
EXPECT_EQ(0, v.size()); // push_back happened on a copy of v... fail!
// pass in an argument by pointer so to avoid copy.
{
- ScopeGuard g = makeGuard(std::bind(push_back, &v, 4));
+ auto g = makeGuard(std::bind(push_back, &v, 4));
(void)g;
}
EXPECT_EQ(1, v.size());
{
// pass in an argument by reference so to avoid copy.
- ScopeGuard g = makeGuard(std::bind(push_back, std::ref(v), 4));
+ auto g = makeGuard(std::bind(push_back, std::ref(v), 4));
(void)g;
}
EXPECT_EQ(2, v.size());
// lambda with a reference to v
{
- ScopeGuard g = makeGuard([&] { v.push_back(5); });
+ auto g = makeGuard([&] { v.push_back(5); });
(void)g;
}
EXPECT_EQ(3, v.size());
// lambda with a copy of v
{
- ScopeGuard g = makeGuard([v] () mutable { v.push_back(6); });
+ auto g = makeGuard([v]() mutable { v.push_back(6); });
(void)g;
}
EXPECT_EQ(3, v.size());
int n = 0;
{
MyFunctor f(&n);
- ScopeGuard g = makeGuard(f);
+ auto g = makeGuard(f);
(void)g;
}
EXPECT_EQ(1, n);
// temporary functor object
n = 0;
{
- ScopeGuard g = makeGuard(MyFunctor(&n));
+ auto g = makeGuard(MyFunctor(&n));
(void)g;
}
EXPECT_EQ(1, n);
}
TEST(ScopeGuard, GuardException) {
- EXPECT_DEATH({
- ScopeGuard g = makeGuard([&] {
- throw std::runtime_error("destructors should never throw!");
- });
- (void)g;
- },
- "destructors should never throw!"
- );
+ EXPECT_DEATH(
+ makeGuard([] { throw std::runtime_error("dtors should never throw!"); }),
+ "dtors should never throw!");
}
/**
v.push_back(1);
// The guard is triggered to undo the insertion unless dismiss() is called.
- ScopeGuard guard = makeGuard([&] { v.pop_back(); });
+ auto guard = makeGuard([&] { v.pop_back(); });
// Do some action; Use the failure argument to pretend
// if it failed or succeeded.
bool cleanupOccurred = false;
try {
- ScopeGuard guard = makeGuard([&] { cleanupOccurred = true; });
+ auto guard = makeGuard([&] { cleanupOccurred = true; });
(void)guard;
try {
/*
- * Copyright 2017 Facebook, Inc.
+ * Copyright 2011-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <folly/ScopeGuard.h>
#include <folly/portability/GFlags.h>
-using folly::ScopeGuard;
using folly::makeGuard;
// Declare the bm_max_iters flag from folly/Benchmark.cpp
BENCHMARK(scope_guard_std_function, iters) {
std::function<void()> fn(doNothing);
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard(fn);
+ auto g = makeGuard(fn);
(void)g;
}
}
// but create the ScopeGuard with an rvalue to a std::function
BENCHMARK(scope_guard_std_function_rvalue, iters) {
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard(std::function<void()>(doNothing));
+ auto g = makeGuard(std::function<void()>(doNothing));
(void)g;
}
}
// but create the ScopeGuard with an rvalue to a folly::Function
BENCHMARK(scope_guard_Function_rvalue, iters) {
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard(folly::Function<void()>(doNothing));
+ auto g = makeGuard(folly::Function<void()>(doNothing));
(void)g;
}
}
// Using ScopeGuard to invoke a function pointer
BENCHMARK(scope_guard_fn_ptr, iters) {
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard(doNothing);
+ auto g = makeGuard(doNothing);
(void)g;
}
}
// Using ScopeGuard to invoke a lambda that does nothing
BENCHMARK(scope_guard_lambda_noop, iters) {
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard([] {});
+ auto g = makeGuard([] {});
(void)g;
}
}
// Using ScopeGuard to invoke a lambda that invokes a function
BENCHMARK(scope_guard_lambda_function, iters) {
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard([] { doNothing(); });
+ auto g = makeGuard([] { doNothing(); });
(void)g;
}
}
BENCHMARK(scope_guard_lambda_local_var, iters) {
uint32_t count = 0;
for (size_t n = 0; n < iters; ++n) {
- ScopeGuard g = makeGuard([&] {
+ auto g = makeGuard([&] {
// Increment count if n is odd. Without this conditional check
// (i.e., if we just increment count each time through the loop),
// gcc is smart enough to optimize the entire loop away, and just set
projects / folly.git / commitdiff