Commit | Line | Data |
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c0a66c84 JG |
1 | /* |
2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
c9e313bc SM |
8 | #include <common/dynamic-array.hpp> |
9 | #include <common/buffer-view.hpp> | |
10 | #include "payload-view.hpp" | |
11 | #include "payload.hpp" | |
c0a66c84 JG |
12 | #include <stddef.h> |
13 | ||
3e6e0df2 JG |
14 | bool lttng_payload_view_is_valid(const struct lttng_payload_view *view) |
15 | { | |
16 | return view && lttng_buffer_view_is_valid(&view->buffer); | |
17 | } | |
18 | ||
c0a66c84 JG |
19 | struct lttng_payload_view lttng_payload_view_from_payload( |
20 | const struct lttng_payload *payload, size_t offset, | |
21 | ptrdiff_t len) | |
22 | { | |
3e6e0df2 | 23 | return payload ? (struct lttng_payload_view) { |
c0a66c84 JG |
24 | .buffer = lttng_buffer_view_from_dynamic_buffer( |
25 | &payload->buffer, offset, len), | |
fe489250 | 26 | ._fd_handles = payload->_fd_handles, |
1c9a0b0e | 27 | ._iterator = {}, |
75864046 MJ |
28 | } : (struct lttng_payload_view) { |
29 | .buffer = {}, | |
1c9a0b0e MJ |
30 | ._fd_handles = {}, |
31 | ._iterator = {}, | |
75864046 | 32 | }; |
c0a66c84 JG |
33 | } |
34 | ||
c0a66c84 JG |
35 | struct lttng_payload_view lttng_payload_view_from_view( |
36 | struct lttng_payload_view *view, size_t offset, | |
37 | ptrdiff_t len) | |
38 | { | |
3e6e0df2 | 39 | return view ? (struct lttng_payload_view) { |
c0a66c84 | 40 | .buffer = lttng_buffer_view_from_view( |
ddab38d1 | 41 | &view->buffer, offset, len), |
fe489250 | 42 | ._fd_handles = view->_fd_handles, |
a6bc4ca9 SM |
43 | ._iterator = { |
44 | .p_fd_handles_position = view->_iterator.p_fd_handles_position ?: | |
fe489250 | 45 | &view->_iterator.fd_handles_position, |
1c9a0b0e | 46 | .fd_handles_position = 0, |
a6bc4ca9 | 47 | } |
75864046 MJ |
48 | } : (struct lttng_payload_view) { |
49 | .buffer = {}, | |
1c9a0b0e MJ |
50 | ._fd_handles = {}, |
51 | ._iterator = {}, | |
75864046 | 52 | }; |
c0a66c84 JG |
53 | } |
54 | ||
c0a66c84 JG |
55 | struct lttng_payload_view lttng_payload_view_from_dynamic_buffer( |
56 | const struct lttng_dynamic_buffer *buffer, size_t offset, | |
57 | ptrdiff_t len) | |
58 | { | |
3e6e0df2 | 59 | return buffer ? (struct lttng_payload_view) { |
c0a66c84 | 60 | .buffer = lttng_buffer_view_from_dynamic_buffer( |
75864046 | 61 | buffer, offset, len), |
1c9a0b0e MJ |
62 | ._fd_handles = {}, |
63 | ._iterator = {}, | |
75864046 MJ |
64 | } : (struct lttng_payload_view) { |
65 | .buffer = {}, | |
1c9a0b0e MJ |
66 | ._fd_handles = {}, |
67 | ._iterator = {}, | |
75864046 | 68 | }; |
c0a66c84 JG |
69 | } |
70 | ||
5a2f5f00 JG |
71 | struct lttng_payload_view lttng_payload_view_from_buffer_view( |
72 | const struct lttng_buffer_view *view, size_t offset, | |
73 | ptrdiff_t len) | |
74 | { | |
3e6e0df2 | 75 | return view ? (struct lttng_payload_view) { |
5a2f5f00 | 76 | .buffer = lttng_buffer_view_from_view( |
75864046 | 77 | view, offset, len), |
1c9a0b0e MJ |
78 | ._fd_handles = {}, |
79 | ._iterator = {}, | |
75864046 MJ |
80 | } : (struct lttng_payload_view) { |
81 | .buffer = {}, | |
1c9a0b0e MJ |
82 | ._fd_handles = {}, |
83 | ._iterator = {}, | |
75864046 | 84 | }; |
5a2f5f00 JG |
85 | } |
86 | ||
e368fb43 JG |
87 | struct lttng_payload_view lttng_payload_view_init_from_buffer( |
88 | const char *src, size_t offset, ptrdiff_t len) | |
89 | { | |
90 | return (struct lttng_payload_view) { | |
91 | .buffer = lttng_buffer_view_init( | |
75864046 | 92 | src, offset, len), |
1c9a0b0e MJ |
93 | ._fd_handles = {}, |
94 | ._iterator = {}, | |
e368fb43 JG |
95 | }; |
96 | } | |
97 | ||
18eec1c9 JG |
98 | int lttng_payload_view_get_fd_handle_count( |
99 | const struct lttng_payload_view *payload_view) | |
5a2f5f00 JG |
100 | { |
101 | int ret; | |
102 | size_t position; | |
103 | ||
104 | if (!payload_view) { | |
105 | ret = -1; | |
106 | goto end; | |
107 | } | |
108 | ||
fe489250 | 109 | ret = lttng_dynamic_pointer_array_get_count(&payload_view->_fd_handles); |
5a2f5f00 JG |
110 | if (ret < 0) { |
111 | goto end; | |
112 | } | |
113 | ||
fe489250 JG |
114 | position = payload_view->_iterator.p_fd_handles_position ? |
115 | *payload_view->_iterator.p_fd_handles_position : | |
116 | payload_view->_iterator.fd_handles_position; | |
5a2f5f00 JG |
117 | ret = ret - (int) position; |
118 | end: | |
119 | return ret; | |
120 | } | |
121 | ||
fe489250 JG |
122 | struct fd_handle *lttng_payload_view_pop_fd_handle( |
123 | struct lttng_payload_view *view) | |
c0a66c84 | 124 | { |
fe489250 JG |
125 | struct fd_handle *handle = NULL; |
126 | size_t fd_handle_count; | |
c0a66c84 JG |
127 | size_t *pos; |
128 | ||
129 | if (!view) { | |
c0a66c84 JG |
130 | goto end; |
131 | } | |
132 | ||
fe489250 JG |
133 | fd_handle_count = lttng_payload_view_get_fd_handle_count(view); |
134 | if (fd_handle_count == 0) { | |
c0a66c84 JG |
135 | goto end; |
136 | } | |
137 | ||
fe489250 JG |
138 | pos = view->_iterator.p_fd_handles_position ? |
139 | view->_iterator.p_fd_handles_position : | |
140 | &view->_iterator.fd_handles_position; | |
a6bc4ca9 | 141 | handle = (fd_handle *) lttng_dynamic_pointer_array_get_pointer(&view->_fd_handles, |
fe489250 | 142 | *pos); |
c0a66c84 | 143 | (*pos)++; |
fe489250 | 144 | fd_handle_get(handle); |
c0a66c84 | 145 | end: |
fe489250 | 146 | return handle; |
c0a66c84 | 147 | } |