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 | ||
5a2f5f00 | 8 | #include <common/dynamic-array.h> |
c0a66c84 JG |
9 | #include <common/buffer-view.h> |
10 | #include "payload-view.h" | |
11 | #include "payload.h" | |
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, |
3e6e0df2 | 27 | } : (struct lttng_payload_view) {}; |
c0a66c84 JG |
28 | } |
29 | ||
c0a66c84 JG |
30 | struct lttng_payload_view lttng_payload_view_from_view( |
31 | struct lttng_payload_view *view, size_t offset, | |
32 | ptrdiff_t len) | |
33 | { | |
3e6e0df2 | 34 | return view ? (struct lttng_payload_view) { |
c0a66c84 | 35 | .buffer = lttng_buffer_view_from_view( |
ddab38d1 | 36 | &view->buffer, offset, len), |
fe489250 | 37 | ._fd_handles = view->_fd_handles, |
a6bc4ca9 SM |
38 | ._iterator = { |
39 | .p_fd_handles_position = view->_iterator.p_fd_handles_position ?: | |
fe489250 | 40 | &view->_iterator.fd_handles_position, |
a6bc4ca9 SM |
41 | } |
42 | } : (struct lttng_payload_view) {}; | |
c0a66c84 JG |
43 | } |
44 | ||
c0a66c84 JG |
45 | struct lttng_payload_view lttng_payload_view_from_dynamic_buffer( |
46 | const struct lttng_dynamic_buffer *buffer, size_t offset, | |
47 | ptrdiff_t len) | |
48 | { | |
3e6e0df2 | 49 | return buffer ? (struct lttng_payload_view) { |
c0a66c84 JG |
50 | .buffer = lttng_buffer_view_from_dynamic_buffer( |
51 | buffer, offset, len) | |
3e6e0df2 | 52 | } : (struct lttng_payload_view) {}; |
c0a66c84 JG |
53 | } |
54 | ||
5a2f5f00 JG |
55 | struct lttng_payload_view lttng_payload_view_from_buffer_view( |
56 | const struct lttng_buffer_view *view, size_t offset, | |
57 | ptrdiff_t len) | |
58 | { | |
3e6e0df2 | 59 | return view ? (struct lttng_payload_view) { |
5a2f5f00 JG |
60 | .buffer = lttng_buffer_view_from_view( |
61 | view, offset, len) | |
3e6e0df2 | 62 | } : (struct lttng_payload_view) {}; |
5a2f5f00 JG |
63 | } |
64 | ||
e368fb43 JG |
65 | struct lttng_payload_view lttng_payload_view_init_from_buffer( |
66 | const char *src, size_t offset, ptrdiff_t len) | |
67 | { | |
68 | return (struct lttng_payload_view) { | |
69 | .buffer = lttng_buffer_view_init( | |
70 | src, offset, len) | |
71 | }; | |
72 | } | |
73 | ||
18eec1c9 JG |
74 | int lttng_payload_view_get_fd_handle_count( |
75 | const struct lttng_payload_view *payload_view) | |
5a2f5f00 JG |
76 | { |
77 | int ret; | |
78 | size_t position; | |
79 | ||
80 | if (!payload_view) { | |
81 | ret = -1; | |
82 | goto end; | |
83 | } | |
84 | ||
fe489250 | 85 | ret = lttng_dynamic_pointer_array_get_count(&payload_view->_fd_handles); |
5a2f5f00 JG |
86 | if (ret < 0) { |
87 | goto end; | |
88 | } | |
89 | ||
fe489250 JG |
90 | position = payload_view->_iterator.p_fd_handles_position ? |
91 | *payload_view->_iterator.p_fd_handles_position : | |
92 | payload_view->_iterator.fd_handles_position; | |
5a2f5f00 JG |
93 | ret = ret - (int) position; |
94 | end: | |
95 | return ret; | |
96 | } | |
97 | ||
fe489250 JG |
98 | struct fd_handle *lttng_payload_view_pop_fd_handle( |
99 | struct lttng_payload_view *view) | |
c0a66c84 | 100 | { |
fe489250 JG |
101 | struct fd_handle *handle = NULL; |
102 | size_t fd_handle_count; | |
c0a66c84 JG |
103 | size_t *pos; |
104 | ||
105 | if (!view) { | |
c0a66c84 JG |
106 | goto end; |
107 | } | |
108 | ||
fe489250 JG |
109 | fd_handle_count = lttng_payload_view_get_fd_handle_count(view); |
110 | if (fd_handle_count == 0) { | |
c0a66c84 JG |
111 | goto end; |
112 | } | |
113 | ||
fe489250 JG |
114 | pos = view->_iterator.p_fd_handles_position ? |
115 | view->_iterator.p_fd_handles_position : | |
116 | &view->_iterator.fd_handles_position; | |
a6bc4ca9 | 117 | handle = (fd_handle *) lttng_dynamic_pointer_array_get_pointer(&view->_fd_handles, |
fe489250 | 118 | *pos); |
c0a66c84 | 119 | (*pos)++; |
fe489250 | 120 | fd_handle_get(handle); |
c0a66c84 | 121 | end: |
fe489250 | 122 | return handle; |
c0a66c84 | 123 | } |