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