| <h2 >The <code>upc_lock</code> function </h2> |
| |
| <h4>Synopsis</h4> |
| <p> |
| |
| <pre> |
| #include <upc.h> |
| void upc_lock(upc_lock_t *ptr); |
| </pre> |
| |
| <p> |
| <h4>Description</h4> |
| |
| <p> |
| The <code>upc_lock</code> function sets the state of the lock pointed to by <code>ptr</code> to locked. |
| <p>If the lock is already in locked state due to the calling thread setting it to |
| locked state, the result is undefined. |
| <p>If the lock is already in locked state, then the calling thread waits for some |
| other thread to set the state to unlocked. |
| <p>Once the lock is in state unlocked, a single calling thread sets the state to |
| locked and the function returns. |
| <p>A null strict access is implied after a call to upc_lock(). |
| |
| <p>  |
| <p>  |
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