Split mpvcore/ into common/, misc/, bstr/

1 files changed, 108 insertions, 0 deletions

diff --git a/misc/ring.h b/misc/ring.h
new file mode 100644
index 0000000000..e93baea97e
--- /dev/null
+++ b/misc/ring.h
@@ -0,0 +1,108 @@
+/*
+ * This file is part of mpv.
+ * Copyright (c) 2012 wm4
+ * Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MPV_MP_RING_H
+#define MPV_MP_RING_H
+
+/**
+ * A simple non-blocking SPSC (single producer, single consumer) ringbuffer
+ * implementation. Thread safety is accomplished through atomic operations.
+ */
+
+struct mp_ring;
+
+/**
+ * Instantiate a new ringbuffer
+ *
+ * talloc_ctx: talloc context of the newly created object
+ * size:       total size in bytes
+ * return:     the newly created ringbuffer
+ */
+struct mp_ring *mp_ring_new(void *talloc_ctx, int size);
+
+/**
+ * Read data from the ringbuffer
+ *
+ * buffer: target ringbuffer instance
+ * dest:   destination buffer for the read data. If NULL read data is discarded.
+ * len:    maximum number of bytes to read
+ * return: number of bytes read
+ */
+int mp_ring_read(struct mp_ring *buffer, unsigned char *dest, int len);
+
+/**
+ * Write data to the ringbuffer
+ *
+ * buffer: target ringbuffer instance
+ * src:    source buffer for the write data
+ * len:    maximum number of bytes to write
+ * return: number of bytes written
+ */
+int mp_ring_write(struct mp_ring *buffer, unsigned char *src, int len);
+
+/**
+ * Drain data from the ringbuffer
+ *
+ * buffer: target ringbuffer instance
+ * len:    maximum number of bytes to drain
+ * return: number of bytes drained
+ */
+int mp_ring_drain(struct mp_ring *buffer, int len);
+
+/**
+ * Reset the ringbuffer discarding any content
+ *
+ * buffer: target ringbuffer instance
+ */
+void mp_ring_reset(struct mp_ring *buffer);
+
+/**
+ * Get the available size for writing
+ *
+ * buffer: target ringbuffer instance
+ * return: number of bytes that can be written
+ */
+int mp_ring_available(struct mp_ring *buffer);
+
+/**
+ * Get the total size
+ *
+ * buffer: target ringbuffer instance
+ * return: total ringbuffer size in bytes
+ */
+int mp_ring_size(struct mp_ring *buffer);
+
+/**
+ * Get the available size for reading
+ *
+ * buffer: target ringbuffer instance
+ * return: number of bytes ready for reading
+ */
+int mp_ring_buffered(struct mp_ring *buffer);
+
+/**
+ * Get a string representation of the ringbuffer
+ *
+ * buffer:     target ringbuffer instance
+ * talloc_ctx: talloc context of the newly created string
+ * return:     string representing the ringbuffer
+ */
+char *mp_ring_repr(struct mp_ring *buffer, void *talloc_ctx);
+
+#endif