1 | /* |
---|
2 | * COPYRIGHT (c) 1989-2011. |
---|
3 | * On-Line Applications Research Corporation (OAR). |
---|
4 | * |
---|
5 | * The license and distribution terms for this file may be |
---|
6 | * found in the file LICENSE in this distribution or at |
---|
7 | * http://www.rtems.org/license/LICENSE. |
---|
8 | */ |
---|
9 | |
---|
10 | #ifdef HAVE_CONFIG_H |
---|
11 | #include "config.h" |
---|
12 | #endif |
---|
13 | |
---|
14 | #include "test_support.h" |
---|
15 | #include "tmacros.h" |
---|
16 | |
---|
17 | #include <rtems/bspIo.h> |
---|
18 | |
---|
19 | static rtems_id locked_print_semaphore; /* synchronisation semaphore */ |
---|
20 | |
---|
21 | static int locked_printf_plugin(void *context, const char *fmt, va_list ap) |
---|
22 | { |
---|
23 | (void) context; |
---|
24 | return locked_vprintf(fmt, ap); |
---|
25 | } |
---|
26 | |
---|
27 | void locked_print_initialize(void) |
---|
28 | { |
---|
29 | rtems_status_code sc; |
---|
30 | static bool initted = false; |
---|
31 | |
---|
32 | if ( initted ) |
---|
33 | return; |
---|
34 | |
---|
35 | initted = true; |
---|
36 | |
---|
37 | /* Create/verify synchronisation semaphore */ |
---|
38 | sc = rtems_semaphore_create( |
---|
39 | rtems_build_name ('S', 'E', 'M', '1'), |
---|
40 | 1, |
---|
41 | RTEMS_LOCAL | |
---|
42 | RTEMS_BINARY_SEMAPHORE | |
---|
43 | RTEMS_PRIORITY_CEILING | |
---|
44 | RTEMS_PRIORITY, |
---|
45 | 1, |
---|
46 | &locked_print_semaphore |
---|
47 | ); |
---|
48 | directive_failed( sc, "rtems_semaphore_create" ); |
---|
49 | |
---|
50 | /* |
---|
51 | * Set up the printer to use the locked printf printer. |
---|
52 | */ |
---|
53 | rtems_test_printer.context = NULL; |
---|
54 | rtems_test_printer.printer = locked_printf_plugin; |
---|
55 | } |
---|
56 | |
---|
57 | int locked_vprintf(const char *fmt, va_list ap) |
---|
58 | { |
---|
59 | int rv; |
---|
60 | rtems_status_code sc; |
---|
61 | |
---|
62 | locked_print_initialize(); |
---|
63 | |
---|
64 | /* Lock semaphore without releasing the cpu */ |
---|
65 | do { |
---|
66 | sc = rtems_semaphore_obtain( locked_print_semaphore, RTEMS_NO_WAIT, 0 ); |
---|
67 | } while (sc != RTEMS_SUCCESSFUL ); |
---|
68 | |
---|
69 | rv = vprintf(fmt, ap); |
---|
70 | |
---|
71 | /* Release the semaphore */ |
---|
72 | rtems_semaphore_release( locked_print_semaphore ); |
---|
73 | |
---|
74 | return rv; |
---|
75 | } |
---|
76 | |
---|
77 | int locked_printf(const char *fmt, ...) |
---|
78 | { |
---|
79 | int rv; |
---|
80 | va_list ap; /* points to each unnamed argument in turn */ |
---|
81 | |
---|
82 | va_start(ap, fmt); /* make ap point to 1st unnamed arg */ |
---|
83 | rv = locked_vprintf(fmt, ap); |
---|
84 | va_end(ap); /* clean up when done */ |
---|
85 | |
---|
86 | return rv; |
---|
87 | } |
---|
88 | |
---|
89 | void locked_printk(const char *fmt, ...) |
---|
90 | { |
---|
91 | va_list ap; /* points to each unnamed argument in turn */ |
---|
92 | rtems_status_code sc; |
---|
93 | |
---|
94 | |
---|
95 | locked_print_initialize(); |
---|
96 | |
---|
97 | /* Lock semaphore without releasing the cpu */ |
---|
98 | do { |
---|
99 | sc = rtems_semaphore_obtain( locked_print_semaphore, RTEMS_NO_WAIT, 0 ); |
---|
100 | } while (sc != RTEMS_SUCCESSFUL ); |
---|
101 | |
---|
102 | va_start(ap, fmt); /* make ap point to 1st unnamed arg */ |
---|
103 | vprintk(fmt, ap); |
---|
104 | va_end(ap); /* clean up when done */ |
---|
105 | |
---|
106 | /* Release the semaphore */ |
---|
107 | rtems_semaphore_release( locked_print_semaphore ); |
---|
108 | } |
---|