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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2000-01-23 19:07:02 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2000-01-23 19:07:02 +0000 |
commit | 8d37343a5d3fef53422c7728a4e8b65bc4045bdb (patch) | |
tree | 188ddc956c8641a759dde204a312ab253baaa9de /cpukit/rtems/src/taskvariableget.c | |
parent | Added rtems_task_variable_get from Eric Norum. (diff) | |
download | rtems-8d37343a5d3fef53422c7728a4e8b65bc4045bdb.tar.bz2 |
Directive rtems_task_variable_get() added by Eric Norum.
Diffstat (limited to '')
-rw-r--r-- | cpukit/rtems/src/taskvariableget.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/cpukit/rtems/src/taskvariableget.c b/cpukit/rtems/src/taskvariableget.c new file mode 100644 index 0000000000..9beb0c4045 --- /dev/null +++ b/cpukit/rtems/src/taskvariableget.c @@ -0,0 +1,72 @@ +/* + * rtems_task_variable_get - Get a per-task variable + * + * + * COPYRIGHT (c) 1989-1999. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#include <rtems/system.h> +#include <rtems/rtems/tasks.h> +#include <rtems/score/wkspace.h> + +/* + * rtems_task_variable_get + * + * This directive gets the value of a task variable. + */ + +rtems_status_code rtems_task_variable_get( + rtems_id tid, + void **ptr, + void **result +) +{ + Thread_Control *the_thread; + Objects_Locations location; + rtems_task_variable_t *tvp; + + the_thread = _Thread_Get (tid, &location); + switch (location) { + case OBJECTS_REMOTE: +#if defined(RTEMS_MULTIPROCESSING) + _Thread_Dispatch(); + return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; +#endif + + case OBJECTS_ERROR: + return RTEMS_INVALID_ID; + + default: + return RTEMS_INTERNAL_ERROR; + + case OBJECTS_LOCAL: + + /* + * Figure out if the variable is in this task's list. + */ + + tvp = the_thread->task_variables; + while (tvp) { + if (tvp->ptr == ptr) { + /* + * Should this return the current (i.e not the + * saved) value if `tid' is the current task? + */ + *result = tvp->var; + _Thread_Enable_dispatch(); + return RTEMS_SUCCESSFUL; + } + tvp = tvp->next; + } + _Thread_Enable_dispatch(); + return RTEMS_INVALID_ADDRESS; + } + return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ +} |