source: mainline/uspace/lib/drv/generic/remote_clock_dev.c@ c1ee46f

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c1ee46f was 9be30cdf, checked in by Jan Vesely <jano.vesely@…>, 12 years ago

libdrv: Make driver ops structures constant

These are statically initialized and we don't modify them.
Moves cca 1KB (30%) of data from .data (rw) section to ro. (driver binaries, amd64)

  • Property mode set to 100644
File size: 4.0 KB
Line 
1/*
2 * Copyright (c) 2012 Maurizio Lombardi
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libdrv
30 * @{
31 */
32/** @file
33 */
34
35#include <async.h>
36#include <errno.h>
37#include <time.h>
38#include <macros.h>
39
40#include <ops/clock_dev.h>
41#include <ddf/driver.h>
42
43static void remote_clock_time_get(ddf_fun_t *, void *, ipc_callid_t,
44 ipc_call_t *);
45static void remote_clock_time_set(ddf_fun_t *, void *, ipc_callid_t,
46 ipc_call_t *);
47
48/** Remote clock interface operations */
49static const remote_iface_func_ptr_t remote_clock_dev_iface_ops[] = {
50 &remote_clock_time_get,
51 &remote_clock_time_set,
52};
53
54/** Remote clock interface structure
55 *
56 * Interface for processing requests from remote clients
57 * addressed by the clock interface.
58 */
59remote_iface_t remote_clock_dev_iface = {
60 .method_count = ARRAY_SIZE(remote_clock_dev_iface_ops),
61 .methods = remote_clock_dev_iface_ops,
62};
63
64/** Process the time_get() request from the remote client
65 *
66 * @param fun The function from which the time is read
67 * @param ops The local ops structure
68 */
69static void
70remote_clock_time_get(ddf_fun_t *fun, void *ops, ipc_callid_t callid,
71 ipc_call_t *call)
72{
73 clock_dev_ops_t *clock_dev_ops = (clock_dev_ops_t *) ops;
74 ipc_callid_t cid;
75 struct tm t;
76 int rc;
77 size_t len;
78
79 if (!async_data_read_receive(&cid, &len)) {
80 /* TODO: Handle protocol error */
81 async_answer_0(callid, EINVAL);
82 return;
83 }
84
85 if (!clock_dev_ops->time_get) {
86 /* The driver does not provide the time_get() functionality */
87 async_answer_0(cid, ENOTSUP);
88 async_answer_0(callid, ENOTSUP);
89 return;
90 }
91
92 rc = (*clock_dev_ops->time_get)(fun, &t);
93
94 if (rc != EOK) {
95 /* Some error occurred */
96 async_answer_0(cid, rc);
97 async_answer_0(callid, rc);
98 return;
99 }
100
101 /* The operation was successful */
102 async_data_read_finalize(cid, &t, sizeof(struct tm));
103 async_answer_0(callid, rc);
104}
105
106/** Process the time_set() request from the remote client
107 *
108 * @param fun The function to which the data are written
109 * @param ops The local ops structure
110 */
111static void remote_clock_time_set(ddf_fun_t *fun, void *ops,
112 ipc_callid_t callid, ipc_call_t *call)
113{
114 clock_dev_ops_t *clock_dev_ops = (clock_dev_ops_t *) ops;
115 int rc;
116 struct tm t;
117 ipc_callid_t cid;
118 size_t len;
119
120 if (!async_data_write_receive(&cid, &len)) {
121 /* TODO: Handle protocol error */
122 async_answer_0(callid, EINVAL);
123 return;
124 }
125
126 if (!clock_dev_ops->time_set) {
127 /* The driver does not support the time_set() functionality */
128 async_answer_0(cid, ENOTSUP);
129 async_answer_0(callid, ENOTSUP);
130 return;
131 }
132
133 async_data_write_finalize(cid, &t, sizeof(struct tm));
134
135 rc = (*clock_dev_ops->time_set)(fun, &t);
136
137 async_answer_0(callid, rc);
138}
139
140/**
141 * @}
142 */
143
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