1 /*
2 * Copyright (c) 2009 Travis Geiselbrecht
3 *
4 * Use of this source code is governed by a MIT-style
5 * license that can be found in the LICENSE file or at
6 * https://opensource.org/licenses/MIT
7 */
8 #include "app.h"
9
10 #include <stdio.h>
11 #include <string.h>
12 #include <lk/err.h>
13 #include <lk/console_cmd.h>
14 #include <kernel/thread.h>
15
16 extern const struct app_descriptor __start_apps __WEAK;
17 extern const struct app_descriptor __stop_apps __WEAK;
18
19 static void start_app(const struct app_descriptor *app, bool detach);
20
21 /* one time setup */
apps_init(void)22 void apps_init(void) {
23 const struct app_descriptor *app;
24
25 /* call all the init routines */
26 for (app = &__start_apps; app != &__stop_apps; app++) {
27 if (app->init)
28 app->init(app);
29 }
30
31 /* start any that want to start on boot */
32 for (app = &__start_apps; app != &__stop_apps; app++) {
33 if (app->entry && (app->flags & APP_FLAG_NO_AUTOSTART) == 0) {
34 start_app(app, true);
35 }
36 }
37 }
38
app_thread_entry(void * arg)39 static int app_thread_entry(void *arg) {
40 const struct app_descriptor *app = (const struct app_descriptor *)arg;
41
42 app->entry(app, NULL);
43
44 return 0;
45 }
46
start_app(const struct app_descriptor * app,bool detach)47 static void start_app(const struct app_descriptor *app, bool detach) {
48 /* dont start an app that has no entry point */
49 if (app->entry == NULL) {
50 return;
51 }
52
53 uint32_t stack_size = (app->flags & APP_FLAG_CUSTOM_STACK_SIZE) ? app->stack_size : DEFAULT_STACK_SIZE;
54
55 printf("starting app %s\n", app->name);
56 thread_t *t = thread_create(app->name, &app_thread_entry, (void *)app, DEFAULT_PRIORITY, stack_size);
57 if (detach) {
58 thread_detach(t);
59 thread_resume(t);
60 } else {
61 thread_resume(t);
62 thread_join(t, NULL, INFINITE_TIME);
63 }
64 }
65
app_start_by_name(const char * name,bool detached)66 status_t app_start_by_name(const char *name, bool detached) {
67 const struct app_descriptor *app;
68
69 /* find the app and call it */
70 for (app = &__start_apps; app != &__stop_apps; app++) {
71 if (!strcmp(app->name, name)) {
72 start_app(app, detached);
73 return NO_ERROR;
74 }
75 }
76
77 return ERR_NOT_FOUND;
78 }
79
list_apps(void)80 static void list_apps(void) {
81 const struct app_descriptor *app;
82
83 for (app = &__start_apps; app != &__stop_apps; app++) {
84 printf("%s\n", app->name);
85 }
86 }
87
cmd_app(int argc,const console_cmd_args * argv)88 static int cmd_app(int argc, const console_cmd_args *argv) {
89 if (argc == 1) {
90 usage:
91 printf("%s subcommands:\n", argv[0].str);
92 printf("%s list : list apps compiled into the system\n", argv[0].str);
93 printf("%s start <name> : run app\n", argv[0].str);
94 return ERR_INVALID_ARGS;
95 } else if (!strcmp(argv[1].str, "list")) {
96 list_apps();
97 } else if (!strcmp(argv[1].str, "start")) {
98 if (argc <= 2) {
99 printf("not enough args\n");
100 goto usage;
101 }
102
103 app_start_by_name(argv[2].str, false);
104 } else {
105 printf("unknown subcommand\n");
106 goto usage;
107 }
108
109 return NO_ERROR;
110 }
111
cmd_start(int argc,const console_cmd_args * argv)112 static int cmd_start(int argc, const console_cmd_args *argv) {
113 if (argc == 1) {
114 printf("not enough args\n");
115 return ERR_INVALID_ARGS;
116 }
117
118 return app_start_by_name(argv[1].str, false);
119 }
120
121 STATIC_COMMAND_START
122 STATIC_COMMAND("app", "commands to operate on apps", &cmd_app)
123 STATIC_COMMAND("start", "shortcut for app start", &cmd_start)
124 STATIC_COMMAND_END(app);
125