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1 /*
2  * Copyright 2017 Advanced Micro Devices, Inc.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * on the rights to use, copy, modify, merge, publish, distribute, sub
9  * license, and/or sell copies of the Software, and to permit persons to whom
10  * the Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
23  *
24  */
25 
26 /**
27  * \file u_async_debug.h
28  * Provides a helper implementation of util_debug_callback which allows debug
29  * messages from non-application threads to be passed back to the application
30  * thread.
31  */
32 
33 #ifndef UTIL_ASYNC_DEBUG_H
34 #define UTIL_ASYNC_DEBUG_H
35 
36 #include "pipe/p_state.h"
37 #include "util/u_debug.h"
38 #include "util/simple_mtx.h"
39 
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43 
44 struct util_debug_message {
45    unsigned *id;
46    enum util_debug_type type;
47    char *msg;
48 };
49 
50 struct util_async_debug_callback {
51    struct util_debug_callback base;
52 
53    simple_mtx_t lock;
54    unsigned count;
55    unsigned max;
56    struct util_debug_message *messages;
57 };
58 
59 void
60 u_async_debug_init(struct util_async_debug_callback *adbg);
61 void
62 u_async_debug_cleanup(struct util_async_debug_callback *adbg);
63 
64 void
65 _u_async_debug_drain(struct util_async_debug_callback *adbg,
66                      struct util_debug_callback *dst);
67 
68 static inline void
u_async_debug_drain(struct util_async_debug_callback * adbg,struct util_debug_callback * dst)69 u_async_debug_drain(struct util_async_debug_callback *adbg,
70                     struct util_debug_callback *dst)
71 {
72    /* Read the count without taking the lock to avoid atomics in the fast path.
73     * We'll re-read the count after taking the lock. */
74    if (adbg->count)
75       _u_async_debug_drain(adbg, dst);
76 }
77 
78 #ifdef __cplusplus
79 }
80 #endif
81 
82 #endif /* UTIL_ASYNC_DEBUG_H */
83