template <typename T>

class WeakPtrFactory

Defined at line 79 of file ../../third_party/perfetto/include/perfetto/ext/base/weak_ptr.h

A simple WeakPtr for single-threaded cases.

Generally keep the WeakPtrFactory as last fields in classes: it makes the

WeakPtr(s) invalidate as first thing in the class dtor.

Usage:

class MyClass {

MyClass() : weak_factory_(this) {}

WeakPtr

<MyClass

> GetWeakPtr() { return weak_factory_.GetWeakPtr(); }

private:

WeakPtrFactory

<MyClass

> weak_factory_;

}

int main() {

std::unique_ptr

<MyClass

> foo(new MyClass);

auto wptr = foo.GetWeakPtr();

ASSERT_TRUE(wptr);

ASSERT_EQ(foo.get(), wptr->get());

foo.reset();

ASSERT_FALSE(wptr);

ASSERT_EQ(nullptr, wptr->get());

}

Public Methods

void WeakPtrFactory<T> (T * owner)

Defined at line 81 of file ../../third_party/perfetto/include/perfetto/ext/base/weak_ptr.h

void ~WeakPtrFactory<T> ()

Defined at line 85 of file ../../third_party/perfetto/include/perfetto/ext/base/weak_ptr.h

WeakPtr<T> GetWeakPtr ()

Can be safely called on any thread, since it simply copies |weak_ptr_|.

Note that any accesses to the returned pointer need to be made on the

thread that created/reset the factory.

Defined at line 93 of file ../../third_party/perfetto/include/perfetto/ext/base/weak_ptr.h

void Reset (T * owner)

Reset the factory to a new owner

thread. May only be called before any

weak pointers were passed out. Future weak pointers will be valid on the

calling thread.

Defined at line 98 of file ../../third_party/perfetto/include/perfetto/ext/base/weak_ptr.h