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Add rtc::Thread invoke policy.

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Policy will allow explicitly specify thread between which invokes are
allowed, or explicitly forbid any invokes.

Change-Id: I360e7cba3ce1c21abd5047c6f175d8c4e0e99c6f
Bug: webrtc:11728
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177526
Reviewed-by: Tommi <tommi@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31604}
This commit is contained in:
Artem Titov
2020-06-29 17:37:32 +02:00
committed by Commit Bot
parent afeb07030e
commit 26d4f9cd39
4 changed files with 124 additions and 0 deletions
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16
rtc_base/thread.h
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@ -338,6 +338,18 @@ class RTC_LOCKABLE RTC_EXPORT Thread : public webrtc::TaskQueueBase {
InvokeInternal(posted_from, functor);
}
// Allows invoke to specified |thread|. Thread never will be dereferenced and
// will be used only for reference-based comparison, so instance can be safely
// deleted. If NDEBUG is defined and DCHECK_ALWAYS_ON is undefined do nothing.
void AllowInvokesToThread(Thread* thread);
// If NDEBUG is defined and DCHECK_ALWAYS_ON is undefined do nothing.
void DisallowAnyInvoke();
// Returns true if |target| was allowed by AllowInvokesToThread() or if no
// calls were made to AllowInvokesToThread and DisallowAnyInvoke. Otherwise
// returns false.
// If NDEBUG is defined and DCHECK_ALWAYS_ON is undefined always returns true.
bool IsInvokeToThreadAllowed(rtc::Thread* target);
// Posts a task to invoke the functor on |this| thread asynchronously, i.e.
// without blocking the thread that invoked PostTask(). Ownership of |functor|
// is passed and (usually, see below) destroyed on |this| thread after it is
@ -566,6 +578,10 @@ class RTC_LOCKABLE RTC_EXPORT Thread : public webrtc::TaskQueueBase {
MessageList messages_ RTC_GUARDED_BY(crit_);
PriorityQueue delayed_messages_ RTC_GUARDED_BY(crit_);
uint32_t delayed_next_num_ RTC_GUARDED_BY(crit_);
#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
std::vector<Thread*> allowed_threads_ RTC_GUARDED_BY(this);
bool invoke_policy_enabled_ RTC_GUARDED_BY(this) = false;
#endif
CriticalSection crit_;
bool fInitialized_;
bool fDestroyed_;