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| <a name="omp_005ftest_005fnest_005flock-_002d_002d-Test-and-set-nested-lock-if-available"></a> |
| <h3 class="section">2.36 <code>omp_test_nest_lock</code> – Test and set nested lock if available</h3> |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Before setting a nested lock, the lock variable must be initialized by |
| <code>omp_init_nest_lock</code>. Contrary to <code>omp_set_nest_lock</code>, |
| <code>omp_test_nest_lock</code> does not block if the lock is not available. |
| If the lock is already held by the current thread, the new nesting count |
| is returned. Otherwise, the return value equals zero. |
| </p> |
| </dd> |
| <dt><em>C/C++</em>:</dt> |
| <dd><table> |
| <tr><td width="20%"><em>Prototype</em>:</td><td width="80%"><code>int omp_test_nest_lock(omp_nest_lock_t *lock);</code></td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Fortran</em>:</dt> |
| <dd><table> |
| <tr><td width="20%"><em>Interface</em>:</td><td width="80%"><code>logical function omp_test_nest_lock(nvar)</code></td></tr> |
| <tr><td width="20%"></td><td width="80%"><code>integer(omp_nest_lock_kind), intent(inout) :: nvar</code></td></tr> |
| </table> |
| |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="omp_005finit_005flock.html#omp_005finit_005flock">omp_init_lock</a>, <a href="omp_005fset_005flock.html#omp_005fset_005flock">omp_set_lock</a>, <a href="omp_005fset_005flock.html#omp_005fset_005flock">omp_set_lock</a> |
| </p> |
| </dd> |
| <dt><em>Reference</em>:</dt> |
| <dd><p><a href="http://www.openmp.org/">OpenMP specification v4.0</a>, Section 3.3.5. |
| </p></dd> |
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