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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkLazyPtr.h"
#include "SkRunnable.h"
#include "SkTaskGroup.h"
namespace {
struct CreateIntFromFloat {
CreateIntFromFloat(float val) : fVal(val) {}
int* operator()() const { return SkNEW_ARGS(int, ((int)fVal)); }
float fVal;
};
// As a template argument this must have external linkage.
void custom_destroy(int* ptr) { *ptr = 99; }
} // namespace
DEF_TEST(LazyPtr, r) {
// Basic usage: calls SkNEW(int).
SkLazyPtr<int> lazy;
int* ptr = lazy.get();
REPORTER_ASSERT(r, ptr);
REPORTER_ASSERT(r, lazy.get() == ptr);
// Advanced usage: calls a functor.
SkLazyPtr<int> lazyFunctor;
int* six = lazyFunctor.get(CreateIntFromFloat(6.4f));
REPORTER_ASSERT(r, six);
REPORTER_ASSERT(r, 6 == *six);
// Just makes sure this is safe.
SkLazyPtr<double> neverRead;
// SkLazyPtr supports custom destroy methods.
{
SkLazyPtr<int, custom_destroy> customDestroy;
ptr = customDestroy.get();
// custom_destroy called here.
}
REPORTER_ASSERT(r, ptr);
REPORTER_ASSERT(r, 99 == *ptr);
// Since custom_destroy didn't actually delete ptr, we do now.
SkDELETE(ptr);
}
DEF_TEST(LazyPtr_Threaded, r) {
static const int kRacers = 321;
// Race to intialize the pointer by calling .get().
SkLazyPtr<int> lazy;
int* seen[kRacers];
sk_parallel_for(kRacers, [&](int i) {
seen[i] = lazy.get();
});
// lazy.get() should return the same pointer to all threads.
for (int i = 1; i < kRacers; i++) {
REPORTER_ASSERT(r, seen[i] != nullptr);
REPORTER_ASSERT(r, seen[i] == seen[0]);
}
}
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