WIP - add extractor, generate snippet_data

node_modules/sharp/vendor/include/vips/threadpool.h

@@ -0,0 +1,146 @@
+/* Thread eval for VIPS.
+ *
+ * 29/9/99 JC
+ *	- from thread.h
+ * 17/3/10
+ * 	- from threadgroup
+ * 	- rework with a simpler distributed work allocation model
+ */
+
+/*
+
+    This file is part of VIPS.
+    
+    VIPS is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+#ifndef VIPS_THREADPOOL_H
+#define VIPS_THREADPOOL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /*__cplusplus*/
+
+#include <vips/semaphore.h>
+
+/* Per-thread state. Allocate functions can use these members to
+ * communicate with work functions.
+ */
+
+#define VIPS_TYPE_THREAD_STATE (vips_thread_state_get_type())
+#define VIPS_THREAD_STATE( obj ) \
+	(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
+	VIPS_TYPE_THREAD_STATE, VipsThreadState ))
+#define VIPS_THREAD_STATE_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_CAST( (klass), \
+	VIPS_TYPE_THREAD_STATE, VipsThreadStateClass))
+#define VIPS_IS_THREAD_STATE( obj ) \
+	(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_THREAD_STATE ))
+#define VIPS_IS_THREAD_STATE_CLASS( klass ) \
+	(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_THREAD_STATE ))
+#define VIPS_THREAD_STATE_GET_CLASS( obj ) \
+	(G_TYPE_INSTANCE_GET_CLASS( (obj), \
+	VIPS_TYPE_THREAD_STATE, VipsThreadStateClass ))
+
+typedef struct _VipsThreadState {
+	VipsObject parent_object;
+
+	/*< public >*/
+	/* Image we run on.
+	 */
+	VipsImage *im;
+
+	/* This region is created and destroyed by the threadpool for the
+	 * use of the worker. 
+	 */
+	VipsRegion *reg;		
+
+	/* Neither used nor set, do what you like with them.
+	 */
+	VipsRect pos;
+	int x, y;
+
+	/* Set in work to get the allocate to signal stop.
+	 */
+	gboolean stop;
+
+	/* The client data passed to the enclosing vips_threadpool_run().
+	 */
+        void *a;
+
+	/* Set in allocate to stall this thread for a moment. Handy for
+	 * debugging race conditions.
+	 */
+	gboolean stall;
+
+} VipsThreadState;
+
+typedef struct _VipsThreadStateClass {
+	VipsObjectClass parent_class;
+	/*< public >*/
+
+} VipsThreadStateClass;
+
+void *vips_thread_state_set( VipsObject *object, void *a, void *b );
+
+/* Don't put spaces around void here, it breaks gtk-doc.
+ */
+GType vips_thread_state_get_type(void);
+
+VipsThreadState *vips_thread_state_new( VipsImage *im, void *a );
+
+/* Constructor for per-thread state.
+ */
+typedef VipsThreadState *(*VipsThreadStartFn)( VipsImage *im, void *a );
+
+/* A work allocate function. This is run single-threaded by a worker to
+ * set up a new work unit. 
+ * Return non-zero for errors. Set *stop for "no more work to do"
+ */
+typedef int (*VipsThreadpoolAllocateFn)( VipsThreadState *state,
+	void *a, gboolean *stop );
+
+/* A work function. This does a unit of work (eg. processing a tile or
+ * whatever). Return non-zero for errors. 
+ */
+typedef int (*VipsThreadpoolWorkFn)( VipsThreadState *state, void *a );
+
+/* A progress function. This is run by the main thread once for every
+ * allocation. Return an error to kill computation early.
+ */
+typedef int (*VipsThreadpoolProgressFn)( void *a );
+
+int vips_threadpool_run( VipsImage *im, 
+	VipsThreadStartFn start, 
+	VipsThreadpoolAllocateFn allocate, 
+	VipsThreadpoolWorkFn work,
+	VipsThreadpoolProgressFn progress,
+	void *a );
+void vips_get_tile_size( VipsImage *im, 
+	int *tile_width, int *tile_height, int *n_lines );
+
+#ifdef __cplusplus
+}
+#endif /*__cplusplus*/
+
+#endif /*VIPS_THREADPOOL_H*/