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#ifndef	__KERNEL_PSTATE_H__
#define	__KERNEL_PSTATE_H__

/*
 * Process state-code type. This is available at user level to the "ps"
 * command, but has no portable user-level use even there as the kernel
 * also supplies "ps" with the printable character-code that corresponds to
 * the state.
 */

typedef enum {
	PS_RUN,			/* Running */
	PS_READY,		/* Ready to run */
	PS_MUTEX,		/* Blocked on a basic or read/write lock */
	PS_SLEEP,		/* Sleeping, signals do not interrupt */
	PS_WAIT,		/* Sleeping, interruptible */
	PS_STOPPED,		/* Stopped */
	PS_ZOMBIE,		/* Exiting */
	PS_MAXSTATE
} procstate_t;


/*
 * The only drawback of using enumerations is that we cannot perform useful
 * tests on them at compile-time with #if. Here we set a feature-test to
 * say whether or not the state code fits in a word (or long-word) mask so
 * that tests for state sets can have some important source-level optimization
 * performed. Your mileage may vary, but it may be faster to use shift-and-
 * mask techniques than a cascade of equality tests; this feature-test says
 * whether these techniques /can/ be applied to this data type.
 */

#define	_PSTATE_CAN_MASK		1

#endif	/* ! defined (__KERNEL_PSTATE_H__) */

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