+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN /* avoid including junk */
+# include <windows.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_cond_t datatype -------------------------- */
+
+struct gl_waitqueue_link
+{
+ struct gl_waitqueue_link *wql_next;
+ struct gl_waitqueue_link *wql_prev;
+};
+typedef struct
+ {
+ struct gl_waitqueue_link wq_list; /* circular list of waiting threads */
+ }
+ gl_linked_waitqueue_t;
+typedef struct
+ {
+ gl_spinlock_t guard; /* protects the initialization */
+ CRITICAL_SECTION lock; /* protects the remaining fields */
+ gl_linked_waitqueue_t waiters; /* waiting threads */
+ }
+ gl_cond_t;
+# define gl_cond_define(STORAGECLASS, NAME) \
+ STORAGECLASS gl_cond_t NAME;
+# define gl_cond_define_initialized(STORAGECLASS, NAME) \
+ STORAGECLASS gl_cond_t NAME = gl_cond_initializer;
+# define gl_cond_initializer \
+ { { 0, -1 } }
+# define glthread_cond_init(COND) \
+ glthread_cond_init_func (COND)
+# define glthread_cond_wait(COND, LOCK) \
+ glthread_cond_wait_func (COND, LOCK)
+# define glthread_cond_timedwait(COND, LOCK, ABSTIME) \
+ glthread_cond_timedwait_func (COND, LOCK, ABSTIME)
+# define glthread_cond_signal(COND) \
+ glthread_cond_signal_func (COND)
+# define glthread_cond_broadcast(COND) \
+ glthread_cond_broadcast_func (COND)
+# define glthread_cond_destroy(COND) \
+ glthread_cond_destroy_func (COND)
+extern int glthread_cond_init_func (gl_cond_t *cond);
+extern int glthread_cond_wait_func (gl_cond_t *cond, gl_lock_t *lock);
+extern int glthread_cond_timedwait_func (gl_cond_t *cond, gl_lock_t *lock, struct timespec *abstime);
+extern int glthread_cond_signal_func (gl_cond_t *cond);
+extern int glthread_cond_broadcast_func (gl_cond_t *cond);
+extern int glthread_cond_destroy_func (gl_cond_t *cond);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WINDOWS_THREADS)