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| author | marha <marha@users.sourceforge.net> | 2011-04-30 16:21:56 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-04-30 16:21:56 +0000 |
| commit | e4dd9264ee8d4a20eef0eec8c8bf8cff2473b46f (patch) | |
| tree | 1804d7456ba8f200c7e329d4e6aa67ce4fb1649f /mesalib/src/gallium/auxiliary/util/u_fifo.h | |
| parent | 88a78ebea08af461224f815a8380ea5c54186f43 (diff) | |
| parent | 0402d388cb9803652c0f9a52ba7dcb6029fdd0b9 (diff) | |
| download | vcxsrv-e4dd9264ee8d4a20eef0eec8c8bf8cff2473b46f.tar.gz vcxsrv-e4dd9264ee8d4a20eef0eec8c8bf8cff2473b46f.tar.bz2 vcxsrv-e4dd9264ee8d4a20eef0eec8c8bf8cff2473b46f.zip | |
svn merge ^/branches/released .
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_fifo.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_fifo.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_fifo.h b/mesalib/src/gallium/auxiliary/util/u_fifo.h new file mode 100644 index 000000000..7c13f119e --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_fifo.h @@ -0,0 +1,94 @@ +/**************************************************************************
+ *
+ * Copyright © 2009 Jakob Bornecrantz
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef U_FIFO_H
+#define U_FIFO_H
+
+#include "util/u_memory.h"
+
+struct util_fifo
+{
+ size_t head;
+ size_t tail;
+ size_t num;
+ size_t size;
+};
+
+static INLINE struct util_fifo *
+u_fifo_create(size_t size)
+{
+ struct util_fifo *fifo;
+ fifo = MALLOC(sizeof(*fifo) + size * sizeof(void*));
+
+ fifo->head = 0;
+ fifo->tail = 0;
+ fifo->num = 0;
+ fifo->size = size;
+
+ return fifo;
+}
+
+static INLINE boolean
+u_fifo_add(struct util_fifo *fifo, void *ptr)
+{
+ void **array = (void**)&fifo[1];
+ if (fifo->num >= fifo->size)
+ return FALSE;
+
+ if (++fifo->head >= fifo->size)
+ fifo->head = 0;
+
+ array[fifo->head] = ptr;
+
+ ++fifo->num;
+
+ return TRUE;
+}
+
+static INLINE boolean
+u_fifo_pop(struct util_fifo *fifo, void **ptr)
+{
+ void **array = (void**)&fifo[1];
+
+ if (!fifo->num)
+ return FALSE;
+
+ if (++fifo->tail >= fifo->size)
+ fifo->tail = 0;
+
+ *ptr = array[fifo->tail];
+
+ ++fifo->num;
+
+ return TRUE;
+}
+
+static INLINE void
+u_fifo_destroy(struct util_fifo *fifo)
+{
+ FREE(fifo);
+}
+
+#endif
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