class UnixTaskRunner
Defined at line 60 of file ../../third_party/perfetto/include/perfetto/ext/base/unix_task_runner.h
Runs a task runner on the current thread.
Implementation note: we currently assume (and enforce in debug builds) that
Run() is called from the thread that constructed the UnixTaskRunner. This is
not strictly necessary, and we could instead track the thread that invokes
Run(). However, a related property that *might* be important to enforce is
that the destructor runs on the task-running thread. Otherwise, if there are
still-pending tasks at the time of destruction, we would destroy those
outside of the task thread (which might be unexpected to the caller). On the
other hand, the std::function task interface discourages use of any
resource-owning tasks (as the callable needs to be copyable), so this might
not be important in practice.
TODO(rsavitski): consider adding a thread-check in the destructor, after
auditing existing usages.
TODO(primiano): rename this to TaskRunnerImpl. The "Unix" part is misleading
now as it supports also Windows.
Public Methods
void UnixTaskRunner ()void ~UnixTaskRunner ()void Run ()Start executing tasks. Doesn't return until Quit() is called. Run() may be
called multiple times on the same task runner.
void Quit ()bool IsIdleForTesting ()Checks whether there are any pending immediate tasks to run. Note that
delayed tasks don't count even if they are due to run.
void AdvanceTimeForTesting (uint32_t ms)Pretends (for the purposes of running delayed tasks) that time advanced by
`ms`.
void PostTask (std::function<void ()> )TaskRunner implementation:
void PostDelayedTask (std::function<void ()> , uint32_t delay_ms)void AddFileDescriptorWatch (PlatformHandle , std::function<void ()> )void RemoveFileDescriptorWatch (PlatformHandle )bool RunsTasksOnCurrentThread ()bool QuitCalled ()Returns true if the task runner is quitting, or has quit and hasn't been
restarted since. Exposed primarily for ThreadTaskRunner, not necessary for
normal use of this class.