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SubjectRe: [PATCH 1/1] fix-task-states-in-sched_switch-event.patch
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On Mon, 2010-05-17 at 00:18 +0200, Carsten Emde wrote:
> #define TASK_RUNNING 0
> +#define TASK_STATE_0 "R"
> +#define TASK_STATE_NAME_0 "running"
> +
> #define TASK_INTERRUPTIBLE 1
> +#define TASK_STATE_1 "S"
> +#define TASK_STATE_NAME_1 "sleeping"
> +
> #define TASK_UNINTERRUPTIBLE 2
> +#define TASK_STATE_2 "D"
> +#define TASK_STATE_NAME_2 "disk sleep"
> +
> #define __TASK_STOPPED 4
> +#define TASK_STATE_4 "T"
> +#define TASK_STATE_NAME_4 "stopped"
> +
> #define __TASK_TRACED 8
> +#define TASK_STATE_8 "t"
> +#define TASK_STATE_NAME_8 "tracing stop"
> +
> /* in tsk->exit_state */
> #define EXIT_ZOMBIE 16
> +#define TASK_STATE_16 "Z"
> +#define TASK_STATE_NAME_16 "zombie"
> +
> #define EXIT_DEAD 32
> +#define TASK_STATE_32 "X"
> +#define TASK_STATE_NAME_32 "dead"
> +
> /* in tsk->state again */
> #define TASK_DEAD 64
> +#define TASK_STATE_64 "x"
> +#define TASK_STATE_NAME_64 "dead"
> +
> #define TASK_WAKEKILL 128
> +#define TASK_STATE_128 "K"
> +#define TASK_STATE_NAME_128 "wakekill"
> +
> #define TASK_WAKING 256
> +#define TASK_STATE_256 "W"
> +#define TASK_STATE_NAME_256 "waking"

Since we all love vile macro magic, is the below any better?

include/linux/task_states.h

TASK_STATE(RUNNING, "R", "running")
TASK_STATE(INTERRUPTIBLE, "S", "sleeping")
...

include/linux/sched.h

enum {
#define TASK_STATE(tstate, tstate_c, tstate_s) __TASK_##tstate,
#include <linux/task_states.h>
#undef TASK_STATE
};
enum {
#define TASK_STATE(tstate, tstate_c, tstate_s) \
TASK_##tstate = 1 << __TASK_##tstate,
#include <linux/task_states.h>
#undef TASK_STATE
};
const char *task_state_to_char =
#define TASK_STATE(tstate, tstate_c, tstate_s) tstate_c
#include <linux/task_states.h>
#undef TASK_STATE
;

const char *task_state_to_string[] = {
#define TASK_STATE(tstate, tstate_c, tstate_s) tstate_s,
#include <linux/task_states.h>
#undef TASK_STATE
};



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