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### 2.32 `omp_unset_lock` – Unset simple lock

Description:

  A simple lock about to be unset must have been locked by `omp_set_lock` or `omp_test_lock` before. In addition, the lock must be held by the thread calling `omp_unset_lock`. Then, the lock becomes unlocked. If one or more threads attempted to set the lock before, one of them is chosen to, again, set the lock to itself.

C/C++:

  Prototype: | `void omp_unset_lock(omp_lock_t *lock);`

Fortran:

  Interface: | `subroutine omp_unset_lock(svar)`
  | `integer(omp_lock_kind), intent(inout) :: svar`

See also:

  omp_set_lock, omp_test_lock

Reference:

  OpenMP specification v4.0, Section 3.3.4.