ref: a411870ee4640241e3c494367d922847da84f972
dir: /os/port/edf.h/
enum { Maxsteps = 200 * 100 * 2, /* 100 periods of 200 procs */ /* Edf.flags field */ Admitted = 0x01, Sporadic = 0x02, Yieldonblock = 0x04, Sendnotes = 0x08, Deadline = 0x10, Yield = 0x20, Extratime = 0x40, Infinity = ~0ULL, }; typedef struct Edf Edf; struct Edf { /* time intervals */ vlong D; /* Deadline */ vlong Delta; /* Inherited deadline */ vlong T; /* period */ vlong C; /* Cost */ vlong S; /* Slice: time remaining in this period */ /* times */ vlong r; /* (this) release time */ vlong d; /* (this) deadline */ vlong t; /* Start of next period, t += T at release */ vlong s; /* Time at which this proc was last scheduled */ /* for schedulability testing */ vlong testDelta; int testtype; /* Release or Deadline */ vlong testtime; Proc *testnext; /* other */ ushort flags; Timer; /* Stats */ vlong edfused; vlong extraused; vlong aged; ulong periods; ulong missed; }; extern Lock edftestlock; /* for atomic admitting/expelling */ #pragma varargck type "t" vlong #pragma varargck type "U" uvlong /* Interface: */ Edf* edflock(Proc*); void edfunlock(void);