Method and device for implementing read-write lock reentry, terminal and storage medium
The embodiments of the present disclosure provide a method and a device for implementing read-write lock reentry, a terminal and a storage medium. The method includes: receiving a write lock request of a thread to a target resource; in response to determining that the target resource is in a write-lock-exclusive state, acquiring a historical write-lock thread to the target resource that is in the write-lock-exclusive state; in response to determining that the thread is identical to the historical write-lock thread, adding a new lock of the thread to the target resource.
1. A method for implementing read-write lock reentry, comprising:
receiving a lock request of a thread to a target resource;
in response to determining that the target resource is in a write-lock-exclusive state, acquiring a historical write-lock thread to the target resource that is in the write-lock-exclusive state;
in response to determining that the target resource is in an unlocked state, adding a write lock of the thread to the target resource and taking the thread as a write-lock thread to the target resource under as case that the lock request is a write-lock request, and adding a read lock of the thread to the target resource and taking the thread as a read-lock thread to the target resource under a case that the lock request is a read-lock request;
in response to determining that ID of the thread is identical to ID of the historical write-lock thread, adding a new lock of the thread to the target resource; and
in response to determining that the ID of thread is different from the ID of the historical write-lock thread, rejecting the lock request of the thread.
2. The method according to claim 1 , after adding the new lock of the thread to the target resource, further comprising:
in response to detecting that all locks of the target resource are unlocked, determining that the target resource is in an unlocked state.
3. The method according to claim 1 , after adding the new lock of the thread to the target resource, further comprising:
receiving and responding to an access instruction of the thread to the target resource.
4. A terminal, comprising:
one or more processors;
a storage device, configured to store one or more programs; and
wherein, when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement a method for implementing read-write lock reentry, the method comprising:
receiving a lock request of a thread to a target resource;
in response to determining that the target resource is in a write-lock-exclusive state, acquiring a historical write-lock thread to the target resource that is in the write-lock-exclusive state;
in response to determining that the target resource is in an unlocked state, adding a write lock of the thread to the target resource and taking the thread as a write-lock thread to the target resource under as case that the lock request is a write-lock request, and adding a read lock of the thread to the target resource and taking the thread as a read-lock thread to the target resource under a case that the lock request is a read-lock request;
in response to determining that ID of the thread is identical to ID of the historical write-lock thread, adding a new lock of the thread to the target resource; and
in response to determining that the ID of thread is different from the ID of the historical write-lock thread, rejecting the lock request of the thread.
5. The terminal according to claim 4 , after adding the new lock of the thread to the target resource, further comprising:
in response to detecting that all locks of the target resource are unlocked, determining that the target resource is in an unlocked state.
6. The terminal according to claim 4 , after adding the new lock of the thread to the target resource, further comprising:
receiving and responding to an access instruction of the thread to the target resource.
7. A non-transitory storage medium having computer programs stored thereon, wherein when the programs are executed by a processor, a method for implementing read-write lock reentry is implemented, the method comprising:
receiving a lock request of a thread to a target resource;
in response to determining that the target resource is in a write-lock-exclusive state, acquiring a historical write-lock thread to the target resource that is in the write-lock-exclusive state;
in response to determining that the target resource is in an unlocked state, adding a write lock of the thread to the target resource and taking the thread as a write-lock thread to the target resource under as case that the lock request is a write-lock request, and adding a read lock of the thread to the target resource and taking the thread as a read-lock thread to the target resource under a case that the lock request is a read-lock request;
in response to determining that ID of the thread is identical to ID of the historical write-lock thread, adding a new lock of the thread to the target resource; and
in response to determining that the ID of thread is different from the ID of the historical write-lock thread, rejecting the lock request of the thread.
8. The non-transitory storage medium according to claim 7 , after adding the new lock of the thread to the target resource, further comprising:
in response to detecting that all locks of the target resource are unlocked, determining that the target resource is in an unlocked state.
9. The non-transitory storage medium according to claim 7 , after adding the new lock of the thread to the target resource, further comprising:
receiving and responding to an access instruction of the thread to the target resource.