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1 /* Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 /* Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
4 */ | 4 */ |
5 #ifndef PPAPI_C_PPB_CORE_H_ | 5 #ifndef PPAPI_C_PPB_CORE_H_ |
6 #define PPAPI_C_PPB_CORE_H_ | 6 #define PPAPI_C_PPB_CORE_H_ |
7 | 7 |
8 #include "ppapi/c/pp_bool.h" | 8 #include "ppapi/c/pp_bool.h" |
9 #include "ppapi/c/pp_resource.h" | 9 #include "ppapi/c/pp_resource.h" |
10 #include "ppapi/c/pp_stdint.h" | 10 #include "ppapi/c/pp_stdint.h" |
11 #include "ppapi/c/pp_time.h" | 11 #include "ppapi/c/pp_time.h" |
12 #include "ppapi/c/pp_var.h" | 12 #include "ppapi/c/pp_var.h" |
13 | 13 |
14 struct PP_CompletionCallback; | 14 struct PP_CompletionCallback; |
15 | 15 |
16 #define PPB_CORE_INTERFACE_0_5 "PPB_Core;0.5" | 16 #define PPB_CORE_INTERFACE_0_5 "PPB_Core;0.5" |
17 #define PPB_CORE_INTERFACE PPB_CORE_INTERFACE_0_5 | 17 #define PPB_CORE_INTERFACE PPB_CORE_INTERFACE_0_5 |
18 | 18 |
19 /** | 19 /** |
20 * @file | 20 * @file |
21 * This file defines the PPB_Core interface defined by the browser and | 21 * This file defines the <code>PPB_Core</code> interface defined by the browser |
22 * and containing pointers to functions related to memory management, | 22 * and containing pointers to functions related to memory management, time, and |
23 * time, and threads. | 23 * threads. |
24 */ | 24 */ |
25 | 25 |
26 /** | 26 /** |
27 * @addtogroup Interfaces | 27 * @addtogroup Interfaces |
28 * @{ | 28 * @{ |
29 */ | 29 */ |
30 | 30 |
31 /** | 31 /** |
32 * The PPB_Core interface contains pointers to functions related to memory | 32 * The <code>PPB_Core</code> interface contains pointers to functions related |
33 * management, time, and threads on the browser. | 33 * to memory management, time, and threads on the browser. |
34 * | 34 * |
35 */ | 35 */ |
36 struct PPB_Core { | 36 struct PPB_Core { |
37 /** | 37 /** |
38 * Same as AddRefVar for Resources. | |
39 * AddRefResource is a pointer to a function that adds a reference to | |
40 * a resource. | |
41 * | 38 * |
42 * @param[in] config A PP_Resource containing the resource. | 39 * AddRefResource() adds a reference to a resource. |
| 40 * |
| 41 * @param[in] config A <code>PP_Resource</code> containing the resource. |
43 */ | 42 */ |
44 void (*AddRefResource)(PP_Resource resource); | 43 void (*AddRefResource)(PP_Resource resource); |
45 | 44 |
46 /** | 45 /** |
47 * ReleaseResource is a pointer to a function that removes a reference | 46 * ReleaseResource() removes a reference from a resource. |
48 * from a resource. | |
49 * | 47 * |
50 * @param[in] config A PP_Resource containing the resource. | 48 * @param[in] config A <code>PP_Resource</code> containing the resource. |
51 */ | 49 */ |
52 /*Same as ReleaseVar for Resources. */ | |
53 void (*ReleaseResource)(PP_Resource resource); | 50 void (*ReleaseResource)(PP_Resource resource); |
54 | 51 |
55 /** | 52 /** |
56 * MemAlloc is a pointer to a function that allocate memory. | 53 * MemAlloc() allocates memory. |
57 * | 54 * |
58 * @param[in] num_bytes A number of bytes to allocate. | 55 * @param[in] num_bytes A number of bytes to allocate. |
59 * @return A pointer to the memory if successful, NULL If the | 56 * |
| 57 * @return A pointer to the memory if successful, <code>NULL</code> If the |
60 * allocation fails. | 58 * allocation fails. |
61 */ | 59 */ |
62 void* (*MemAlloc)(uint32_t num_bytes); | 60 void* (*MemAlloc)(uint32_t num_bytes); |
63 | 61 |
64 /** | 62 /** |
65 * MemFree is a pointer to a function that deallocates memory. | 63 * <code>MemFree()</code> deallocates memory. |
66 * | 64 * |
67 * @param[in] ptr A pointer to the memory to deallocate. It is safe to | 65 * @param[in] ptr A pointer to the memory to deallocate. It is safe to |
68 * pass NULL to this function. | 66 * pass <code>NULL</code> to this function. |
69 */ | 67 */ |
70 void (*MemFree)(void* ptr); | 68 void (*MemFree)(void* ptr); |
71 | 69 |
72 /** | 70 /** |
73 * GetTime is a pointer to a function that returns the "wall clock | 71 * GetTime() returns the "wall clock time" according to the |
74 * time" according to the browser. | 72 * browser. |
75 * | 73 * |
76 * @return A PP_Time containing the "wall clock time" according to the | 74 * @return A <code>PP_Time</code> containing the "wall clock time" according |
77 * browser. | 75 * to the browser. |
78 */ | 76 */ |
79 PP_Time (*GetTime)(); | 77 PP_Time (*GetTime)(); |
80 | 78 |
81 /** | 79 /** |
82 * GetTimeTicks is a pointer to a function that returns the "tick time" | 80 * GetTimeTicks() returns the "tick time" according to the browser. |
83 * according to the browser. This clock is used by the browser when passing | 81 * This clock is used by the browser when passing some event times to the |
84 * some event times to the plugin (e.g., via the | 82 * module (e.g. using the <code>PP_InputEvent::time_stamp_seconds</code> |
85 * PP_InputEvent::time_stamp_seconds field). It is not correlated to any | 83 * field). It is not correlated to any actual wall clock time |
86 * actual wall clock time (like GetTime()). Because of this, it will not run | 84 * (like GetTime()). Because of this, it will not run change if the user |
87 * change if the user changes their computer clock. | 85 * changes their computer clock. |
88 * | 86 * |
89 * @return A PP_TimeTicks containing the "tick time" according to the | 87 * @return A <code>PP_TimeTicks</code> containing the "tick time" according |
90 * browser. | 88 * to the browser. |
91 */ | 89 */ |
92 | 90 |
93 // TODO(brettw) http://code.google.com/p/chromium/issues/detail?id=57448 | 91 // TODO(brettw) http://code.google.com/p/chromium/issues/detail?id=57448 |
94 // This currently does change with wall clock time, but will be fixed in | 92 // This currently does change with wall clock time, but will be fixed in |
95 // a future release. | 93 // a future release. |
96 PP_TimeTicks (*GetTimeTicks)(); | 94 PP_TimeTicks (*GetTimeTicks)(); |
97 | 95 |
98 /** | 96 /** |
99 * CallOnMainThread is a pointer to a function that schedules work to be | 97 * CallOnMainThread() schedules work to be executed on the main module thread |
100 * executed on the main module thread after the specified delay. The delay | 98 * after the specified delay. The delay may be 0 to specify a call back as |
101 * may be 0 to specify a call back as soon as possible. | 99 * soon as possible. |
102 * | 100 * |
103 * The |result| parameter will just be passed as the second argument to the | 101 * The <code>result</code> parameter will just be passed as the second |
104 * callback. Many applications won't need this, but it allows a plugin to | 102 * argument to the callback. Many applications won't need this, but it allows |
105 * emulate calls of some callbacks which do use this value. | 103 * a module to emulate calls of some callbacks which do use this value. |
106 * | 104 * |
107 * NOTE: CallOnMainThread, even when used from the main thread with a delay | 105 * <strong>Note:</strong> CallOnMainThread, even when used from the main |
108 * of 0 milliseconds, will never directly invoke the callback. Even in this | 106 * thread with a delay of 0 milliseconds, will never directly invoke the |
109 * case, the callback will be scheduled asynchronously. | 107 * callback. Even in this case, the callback will be scheduled |
| 108 * asynchronously. |
110 * | 109 * |
111 * NOTE: If the browser is shutting down or if the plugin has no instances, | 110 * <strong>Note:</strong> If the browser is shutting down or if the module |
112 * then the callback function may not be called. | 111 * has no instances, then the callback function may not be called. |
113 * | 112 * |
114 * @param[in] delay_in_milliseconds An int32_t delay in milliseconds. | 113 * @param[in] delay_in_milliseconds An int32_t delay in milliseconds. |
115 * @param[in] callback A PP_CompletionCallback callback function that the | 114 * @param[in] callback A <code>PP_CompletionCallback</code> callback function |
116 * browser will call after the specified delay. | 115 * that the browser will call after the specified delay. |
117 * @param[in] result An int32_t that the browser will pass to the given | 116 * @param[in] result An int32_t that the browser will pass to the given |
118 * PP_CompletionCallback. | 117 * <code>PP_CompletionCallback</code>. |
119 */ | 118 */ |
120 void (*CallOnMainThread)(int32_t delay_in_milliseconds, | 119 void (*CallOnMainThread)(int32_t delay_in_milliseconds, |
121 struct PP_CompletionCallback callback, | 120 struct PP_CompletionCallback callback, |
122 int32_t result); | 121 int32_t result); |
123 | 122 |
124 /** | 123 /** |
125 * IsMainThread is a pointer to a function that returns true if the | 124 * IsMainThread() returns true if the current thread is the main pepper |
126 * current thread is the main pepper thread. | 125 * thread. |
127 * | 126 * |
128 * This function is useful for implementing sanity checks, and deciding if | 127 * This function is useful for implementing sanity checks, and deciding if |
129 * dispatching using CallOnMainThread() is required. | 128 * dispatching using CallOnMainThread() is required. |
130 * | 129 * |
131 * @return A PP_BOOL containing PP_TRUE if the current thread is the main | 130 * @return A <code>PP_Bool</code> containing <code>PP_TRUE</code> if the |
132 * pepper thread, otherwise PP_FALSE. | 131 * current thread is the main pepper thread, otherwise <code>PP_FALSE</code>. |
133 */ | 132 */ |
134 PP_Bool (*IsMainThread)(); | 133 PP_Bool (*IsMainThread)(); |
135 }; | 134 }; |
136 /** | 135 /** |
137 * @} | 136 * @} |
138 */ | 137 */ |
139 | 138 |
140 | 139 |
141 #endif /* PPAPI_C_DEV_PPB_CORE_DEV_H_ */ | 140 #endif /* PPAPI_C_DEV_PPB_CORE_DEV_H_ */ |
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