class Fence
Defined at line 61 of file ../../src/graphics/display/drivers/coordinator/fence.h
Manages an event imported by a Coordinator client.
The class currently uses Vulkan terminology, rather than Fuchsia event
terminology.
Fences are reference-counted. When all the references are dropped, the any
pending wait operation is canceled, and the event is released.
Instances are not thread-safe and must be accessed on a single synchronized
dispatcher.
Public Methods
void Fence (FenceListener * listener, fdf::UnownedSynchronizedDispatcher dispatcher, display::EventId id, zx::event event)`listener` methods are called on `dispatcher`. `listener`
must not be null and must outlive the newly created instance.
`dispatcher` must not be null and must outlive the newly created instance.
The instance must be accessed exclusively on the dispatcher.
`id` and `event` must be valid.
Defined at line 67 of file ../../src/graphics/display/drivers/coordinator/fence.cc
void Fence (const Fence & )Defined at line 75 of file ../../src/graphics/display/drivers/coordinator/fence.h
Fence & operator= (const Fence & )Defined at line 76 of file ../../src/graphics/display/drivers/coordinator/fence.h
void ~Fence ()Defined at line 87 of file ../../src/graphics/display/drivers/coordinator/fence.cc
zx::result<> Wait ()Brings the fence in the waited-for state.
Signaling a waited-for fence's event causes a call to
`FenceListener::OnFenceSignaled()`.
This method is idempotent. It makes no change if the fence is already
waited-for.
The wait operation is automatically canceled when a waited-for fence is
destroyed. This can be avoided by holding a reference to the fence while
waiting for it to be signaled.
Defined at line 35 of file ../../src/graphics/display/drivers/coordinator/fence.cc
void Signal ()Signals the fence's underlying event.
Defined at line 29 of file ../../src/graphics/display/drivers/coordinator/fence.cc