Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_LockRWLockForWriting - Lock the read/write lock for _write_ operations.
SYNOPSIS
#include <SDL3/SDL_mutex.h>
void SDL_LockRWLockForWriting(SDL_RWLock *rwlock);
DESCRIPTION
This will block until the rwlock is available, which is to say it is not locked for reading or writing by
any other thread. Only one thread may hold the lock when it requests write access; all other threads,
whether they also want to write or only want read-only access, must wait until the writer thread has
released the lock.
It is illegal for the owning thread to lock an already-locked rwlock for writing (read-only may be locked
recursively, writing can not). Doing so results in undefined behavior.
It is illegal to request a write lock from a thread that already holds a read-only lock. Doing so results
in undefined behavior. Unlock the read-only lock before requesting a write lock.
This function does not fail; if rwlock is NULL, it will return immediately having locked nothing. If the
rwlock is valid, this function will always block until it can lock the mutex, and return with it locked.
FUNCTION PARAMETERS
rwlock the read/write lock to lock.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
SDL_LockRWLockForReading(3), SDL_TryLockRWLockForWriting(3), SDL_UnlockRWLock(3)
Simple Directmedia Layer SDL 3.2.20 SDL_LockRWLockForWriting(3)