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ircd::ctx::mutex: Add deadlock assertion on lock.

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This commit is contained in:
Jason Volk 2019-09-10 11:05:17 -07:00
parent fcb4f6c5f4
commit 87fd0f04ea
1 changed files with 16 additions and 0 deletions
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16
include/ircd/ctx/mutex.h
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@ -26,6 +26,8 @@ class ircd::ctx::mutex
dock q;
bool m;
void deadlock_assertion() const noexcept;
public:
bool locked() const noexcept;
size_t waiting() const noexcept;
@ -92,6 +94,8 @@ ircd::ctx::mutex::unlock()
inline void
ircd::ctx::mutex::lock()
{
deadlock_assertion();
q.wait([this]
{
return !locked();
@ -111,6 +115,8 @@ template<class time_point>
bool
ircd::ctx::mutex::try_lock_until(const time_point &tp)
{
deadlock_assertion();
const bool success
{
q.wait_until(tp, [this]
@ -129,6 +135,8 @@ inline bool
ircd::ctx::mutex::try_lock()
noexcept
{
deadlock_assertion();
if(locked())
return false;
@ -156,3 +164,11 @@ const noexcept
{
return m;
}
inline void
__attribute__((always_inline, artificial))
ircd::ctx::mutex::deadlock_assertion()
const noexcept
{
assert(!locked() || !waiting(cur()));
}