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/**
 * @file
 * u_debug_flush.h - Header for debugging flush- and map- related issues.
 * - Flush while synchronously mapped.
 * - Command stream reference while synchronously mapped.
 * - Synchronous map while referenced on command stream.
 * - Recursive maps.
 * - Unmap while not mapped.
 *
 * @author Thomas Hellstrom <thellstrom@vmware.com>
 */
#ifdef DEBUG

#ifndef U_DEBUG_FLUSH_H_
#define U_DEBUG_FLUSH_H_

struct debug_flush_buf;
struct debug_flush_ctx;

/**
 * Create a buffer (AKA allocation) representation.
 *
 * @param supports_persistent Whether persistent maps are truly supported.
 * @param bt_depth Depth of backtrace to be captured for this buffer
 * representation.
 */
struct debug_flush_buf *
debug_flush_buf_create(boolean supports_persistent, unsigned bt_depth);

/**
 * Reference a buffer representation.
 *
 * @param dst Pointer copy destination
 * @param src Pointer copy source (may be NULL).
 *
 * Replace a pointer to a buffer representation with proper refcounting.
 */
void
debug_flush_buf_reference(struct debug_flush_buf **dst,
                          struct debug_flush_buf *src);

/**
 * Create a context representation.
 *
 * @param catch_map_of_referenced Whether to catch synchronous maps of buffers
 * already present on the command stream.
 * @param bt_depth Depth of backtrace to be captured for this context
 * representation.
 */
struct debug_flush_ctx *
debug_flush_ctx_create(boolean catch_map_of_referenced, unsigned bt_depth);

/**
 * Destroy a context representation.
 *
 * @param fctx The context representation to destroy.
 */
void
debug_flush_ctx_destroy(struct debug_flush_ctx *fctx);

/**
 * Map annotation
 *
 * @param fbuf The buffer representation to map.
 * @param flags Pipebuffer flags for the map.
 *
 * Used to annotate a map of the buffer described by the buffer representation.
 */
void debug_flush_map(struct debug_flush_buf *fbuf, unsigned flags);

/**
 * Unmap annotation
 *
 * @param fbuf The buffer representation to map.
 *
 * Used to annotate an unmap of the buffer described by the
 * buffer representation.
 */
void debug_flush_unmap(struct debug_flush_buf *fbuf);

/**
 * Might flush annotation
 *
 * @param fctx The context representation that might be flushed.
 *
 * Used to annotate a conditional (possible) flush of the given context.
 */
void debug_flush_might_flush(struct debug_flush_ctx *fctx);

/**
 * Flush annotation
 *
 * @param fctx The context representation that is flushed.
 *
 * Used to annotate a real flush of the given context.
 */
void debug_flush_flush(struct debug_flush_ctx *fctx);


/**
 * Flush annotation
 *
 * @param fctx The context representation that is flushed.
 *
 * Used to annotate a real flush of the given context.
 */
void debug_flush_cb_reference(struct debug_flush_ctx *fctx,
                              struct debug_flush_buf *fbuf);

#endif
#endif