diff options
Diffstat (limited to 'include/task_id.h')
| -rw-r--r-- | include/task_id.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/task_id.h b/include/task_id.h new file mode 100644 index 0000000000..8b6e14721f --- /dev/null +++ b/include/task_id.h @@ -0,0 +1,41 @@ +/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* define the task identifier of all compiled tasks */ + +#ifndef __TASK_ID_H +#define __TASK_ID_H + +/* define the name of the header containing the list of tasks */ +#define STRINGIFY0(name) #name +#define STRINGIFY(name) STRINGIFY0(name) +#define TASK_LIST STRINGIFY(TASKFILE) + +/* Task identifier (8 bits) */ +typedef uint8_t task_id_t; + +/** + * enumerate all tasks in the priority order + * + * the identifier of a task can be retrieved using the following constant: + * TASK_ID_<taskname> where <taskname> is the first parameter passed to the + * TASK macro in the TASK_LIST file. + */ +#define TASK(n, r, d) TASK_ID_##n, +#include TASK_LIST +enum { + TASK_ID_IDLE, + /* CONFIG_TASK_LIST is a macro coming from the TASK_LIST file */ + CONFIG_TASK_LIST + /* Number of tasks */ + TASK_ID_COUNT, + /* Special task identifiers */ + TASK_ID_TIMER = 0x1f, /* message from an expired timer */ + TASK_ID_CURRENT = 0xfe, /* the currently running task */ + TASK_ID_INVALID = 0xff /* unable to find the task */ +}; +#undef TASK + +#endif /* __TASK_ID_H */ |