1/*--------------------------------------------------------------------------
2Copyright (c) 2010, The Linux Foundation. All rights reserved.
3
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are met:
6    * Redistributions of source code must retain the above copyright
7      notice, this list of conditions and the following disclaimer.
8    * Redistributions in binary form must reproduce the above copyright
9      notice, this list of conditions and the following disclaimer in the
10      documentation and/or other materials provided with the distribution.
11    * Neither the name of The Linux Foundation nor
12      the names of its contributors may be used to endorse or promote
13      products derived from this software without specific prior written
14      permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27--------------------------------------------------------------------------*/
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31
32#include <fcntl.h>
33#include <errno.h>
34
35#include <aenc_svr.h>
36
37/**
38 @brief This function processes posted messages
39
40 Once thread is being spawned, this function is run to
41 start processing commands posted by client
42
43 @param info pointer to context
44
45 */
46void *omx_evrc_msg(void *info)
47{
48    struct evrc_ipc_info *evrc_info = (struct evrc_ipc_info*)info;
49    unsigned char id;
50    ssize_t n;
51
52    DEBUG_DETAIL("\n%s: message thread start\n", __FUNCTION__);
53    while (!evrc_info->dead)
54    {
55        n = read(evrc_info->pipe_in, &id, 1);
56        if (0 == n) break;
57        if (1 == n)
58        {
59          DEBUG_DETAIL("\n%s-->pipe_in=%d pipe_out=%d\n",
60                                               evrc_info->thread_name,
61                                               evrc_info->pipe_in,
62                                               evrc_info->pipe_out);
63
64            evrc_info->process_msg_cb(evrc_info->client_data, id);
65        }
66        if ((n < 0) && (errno != EINTR)) break;
67    }
68    DEBUG_DETAIL("%s: message thread stop\n", __FUNCTION__);
69
70    return 0;
71}
72
73void *omx_evrc_events(void *info)
74{
75    struct evrc_ipc_info *evrc_info = (struct evrc_ipc_info*)info;
76    unsigned char id = 0;
77
78    DEBUG_DETAIL("%s: message thread start\n", evrc_info->thread_name);
79    evrc_info->process_msg_cb(evrc_info->client_data, id);
80    DEBUG_DETAIL("%s: message thread stop\n", evrc_info->thread_name);
81    return 0;
82}
83
84/**
85 @brief This function starts command server
86
87 @param cb pointer to callback function from the client
88 @param client_data reference client wants to get back
89  through callback
90 @return handle to msging thread
91 */
92struct evrc_ipc_info *omx_evrc_thread_create(
93                                    message_func cb,
94                                    void* client_data,
95                                    char* th_name)
96{
97    int r;
98    int fds[2];
99    struct evrc_ipc_info *evrc_info;
100
101    evrc_info = calloc(1, sizeof(struct evrc_ipc_info));
102    if (!evrc_info)
103    {
104        return 0;
105    }
106
107    evrc_info->client_data = client_data;
108    evrc_info->process_msg_cb = cb;
109    strlcpy(evrc_info->thread_name, th_name, sizeof(evrc_info->thread_name));
110
111    if (pipe(fds))
112    {
113        DEBUG_PRINT_ERROR("\n%s: pipe creation failed\n", __FUNCTION__);
114        goto fail_pipe;
115    }
116
117    evrc_info->pipe_in = fds[0];
118    evrc_info->pipe_out = fds[1];
119
120    r = pthread_create(&evrc_info->thr, 0, omx_evrc_msg, evrc_info);
121    if (r < 0) goto fail_thread;
122
123    DEBUG_DETAIL("Created thread for %s \n", evrc_info->thread_name);
124    return evrc_info;
125
126
127fail_thread:
128    close(evrc_info->pipe_in);
129    close(evrc_info->pipe_out);
130
131fail_pipe:
132    free(evrc_info);
133
134    return 0;
135}
136
137/**
138 *  @brief This function starts command server
139 *
140 *   @param cb pointer to callback function from the client
141 *    @param client_data reference client wants to get back
142 *      through callback
143 *       @return handle to msging thread
144 *        */
145struct evrc_ipc_info *omx_evrc_event_thread_create(
146                                    message_func cb,
147                                    void* client_data,
148                                    char* th_name)
149{
150    int r;
151    int fds[2];
152    struct evrc_ipc_info *evrc_info;
153
154    evrc_info = calloc(1, sizeof(struct evrc_ipc_info));
155    if (!evrc_info)
156    {
157        return 0;
158    }
159
160    evrc_info->client_data = client_data;
161    evrc_info->process_msg_cb = cb;
162    strlcpy(evrc_info->thread_name, th_name, sizeof(evrc_info->thread_name));
163
164    if (pipe(fds))
165    {
166        DEBUG_PRINT("\n%s: pipe creation failed\n", __FUNCTION__);
167        goto fail_pipe;
168    }
169
170    evrc_info->pipe_in = fds[0];
171    evrc_info->pipe_out = fds[1];
172
173    r = pthread_create(&evrc_info->thr, 0, omx_evrc_events, evrc_info);
174    if (r < 0) goto fail_thread;
175
176    DEBUG_DETAIL("Created thread for %s \n", evrc_info->thread_name);
177    return evrc_info;
178
179
180fail_thread:
181    close(evrc_info->pipe_in);
182    close(evrc_info->pipe_out);
183
184fail_pipe:
185    free(evrc_info);
186
187    return 0;
188}
189
190void omx_evrc_thread_stop(struct evrc_ipc_info *evrc_info) {
191    DEBUG_DETAIL("%s stop server\n", __FUNCTION__);
192    close(evrc_info->pipe_in);
193    close(evrc_info->pipe_out);
194    pthread_join(evrc_info->thr,NULL);
195    evrc_info->pipe_out = -1;
196    evrc_info->pipe_in = -1;
197    DEBUG_DETAIL("%s: message thread close fds%d %d\n", evrc_info->thread_name,
198        evrc_info->pipe_in,evrc_info->pipe_out);
199    free(evrc_info);
200}
201
202void omx_evrc_post_msg(struct evrc_ipc_info *evrc_info, unsigned char id) {
203    DEBUG_DETAIL("\n%s id=%d\n", __FUNCTION__,id);
204    write(evrc_info->pipe_out, &id, 1);
205}
206