Annotation of src/sys/sys/lwp.h, Revision 1.11
1.11 ! cl 1: /* $NetBSD: lwp.h,v 1.10 2003/09/13 08:32:18 jdolecek Exp $ */
1.2 thorpej 2:
3: /*-
4: * Copyright (c) 2001 The NetBSD Foundation, Inc.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Nathan J. Williams.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the NetBSD
21: * Foundation, Inc. and its contributors.
22: * 4. Neither the name of The NetBSD Foundation nor the names of its
23: * contributors may be used to endorse or promote products derived
24: * from this software without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: #ifndef _SYS_LWP_H
40: #define _SYS_LWP_H
41:
42:
43: #if defined(_KERNEL)
44: #include <machine/cpu.h> /* curcpu() and cpu_info */
45: #endif
46: #include <machine/proc.h> /* Machine-dependent proc substruct. */
47: #include <sys/queue.h>
48: #include <sys/callout.h>
49: #include <sys/ucontext.h>
50:
51: struct lwp {
52: struct lwp *l_forw; /* Doubly-linked run/sleep queue. */
53: struct lwp *l_back;
54: LIST_ENTRY(lwp) l_list; /* Entry on list of all LWPs. */
55: LIST_ENTRY(lwp) l_zlist; /* Entry on zombie list. */
56:
57: struct proc *l_proc; /* Process with which we are associated. */
58:
59: LIST_ENTRY(lwp) l_sibling; /* Entry on process's list of LWPs. */
60:
61: struct cpu_info * __volatile l_cpu; /* CPU we're running on if
62: SONPROC */
1.5 matt 63: int l_flag;
1.2 thorpej 64: int l_stat;
65: lwpid_t l_lid; /* LWP identifier; local to process. */
66:
67: #define l_startzero l_swtime
68: u_int l_swtime; /* Time swapped in or out. */
69: u_int l_slptime; /* Time since last blocked. */
70:
1.6 yamt 71: const void *l_wchan; /* Sleep address. */
1.2 thorpej 72: struct callout l_tsleep_ch; /* callout for tsleep */
73: const char *l_wmesg; /* Reason for sleep. */
74: int l_holdcnt; /* If non-zero, don't swap. */
1.9 jdolecek 75: void *l_ctxlink; /* uc_link {get,set}context */
1.10 jdolecek 76: int l_dupfd; /* Sideways return value from cloning devices XXX */
1.11 ! cl 77: void *l_upcallstack; /* Upcall stack used during blocking upcall */
1.2 thorpej 78:
79: #define l_endzero l_priority
80:
81: #define l_startcopy l_priority
82:
83: u_char l_priority; /* Process priority. */
84: u_char l_usrpri; /* User-priority based on p_cpu and p_nice. */
85:
86: #define l_endcopy l_private
87:
88: void *l_private; /* svr4-style lwp-private data */
1.4 manu 89: #ifdef notyet
1.3 matt 90: void *l_emuldata; /* kernel lwp-private data */
1.4 manu 91: #endif
1.2 thorpej 92:
93: int l_locks; /* DEBUG: lockmgr count of held locks */
94:
95: struct user *l_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
96: struct mdlwp l_md; /* Any machine-dependent fields. */
97:
98: };
99:
100: LIST_HEAD(lwplist, lwp); /* a list of LWPs */
101:
102: extern struct lwplist alllwp; /* List of all LWPs. */
103: extern struct lwplist deadlwp; /* */
104: extern struct lwplist zomblwp;
105:
106: extern struct pool lwp_pool; /* memory pool for LWPs */
107: extern struct pool lwp_uc_pool; /* memory pool for LWP startup args */
108:
109: extern struct lwp lwp0; /* LWP for proc0 */
110:
111: /* These flags are kept in l_flag. */
112: #define L_INMEM 0x00004 /* Loaded into memory. */
113: #define L_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
114: #define L_SINTR 0x00080 /* Sleep is interruptible. */
115: #define L_TIMEOUT 0x00400 /* Timing out during sleep. */
116: #define L_BIGLOCK 0x80000 /* LWP needs kernel "big lock" to run */
117: #define L_SA 0x100000 /* Scheduler activations LWP */
118: #define L_SA_UPCALL 0x200000 /* SA upcall is pending */
119: #define L_SA_BLOCKING 0x400000 /* Blocking in tsleep() */
120: #define L_DETACHED 0x800000 /* Won't be waited for. */
1.7 fvdl 121: #define L_SA_WANTS_VP 0x1000000 /* SA LWP wants a virtual processor */
1.8 matt 122: #define L_CANCELLED 0x2000000 /* tsleep should not sleep */
1.11 ! cl 123: #define L_SA_PAGEFAULT 0x4000000 /* SA LWP in pagefault handler */
1.2 thorpej 124:
125: /*
126: * Status values.
127: *
128: * A note about SRUN and SONPROC: SRUN indicates that a process is
129: * runnable but *not* yet running, i.e. is on a run queue. SONPROC
130: * indicates that the process is actually executing on a CPU, i.e.
131: * it is no longer on a run queue.
132: */
133: #define LSIDL 1 /* Process being created by fork. */
134: #define LSRUN 2 /* Currently runnable. */
135: #define LSSLEEP 3 /* Sleeping on an address. */
136: #define LSSTOP 4 /* Process debugging or suspension. */
137: #define LSZOMB 5 /* Awaiting collection by parent. */
138: #define LSDEAD 6 /* Process is almost a zombie. */
139: #define LSONPROC 7 /* Process is currently on a CPU. */
140: #define LSSUSPENDED 8 /* Not running, not signalable. */
141:
142: #ifdef _KERNEL
143: #define PHOLD(l) \
144: do { \
145: if ((l)->l_holdcnt++ == 0 && ((l)->l_flag & L_INMEM) == 0) \
146: uvm_swapin(l); \
147: } while (/* CONSTCOND */ 0)
148: #define PRELE(l) (--(l)->l_holdcnt)
149:
150:
151: void preempt (int);
152: int mi_switch (struct lwp *, struct lwp *);
153: #ifndef remrunqueue
154: void remrunqueue (struct lwp *);
155: #endif
156: void resetpriority (struct lwp *);
157: void setrunnable (struct lwp *);
158: #ifndef setrunqueue
159: void setrunqueue (struct lwp *);
160: #endif
161: #ifndef nextrunqueue
162: struct lwp *nextrunqueue(void);
163: #endif
164: void unsleep (struct lwp *);
165: #ifndef cpu_switch
166: int cpu_switch (struct lwp *, struct lwp *);
167: #endif
168: #ifndef cpu_switchto
169: void cpu_switchto (struct lwp *, struct lwp *);
170: #endif
171:
172: int newlwp(struct lwp *, struct proc *, vaddr_t, int /* XXX boolean_t */, int,
173: void *, size_t, void (*)(void *), void *, struct lwp **);
174:
175: /* Flags for _lwp_wait1 */
176: #define LWPWAIT_EXITCONTROL 0x00000001
177: int lwp_wait1(struct lwp *, lwpid_t, lwpid_t *, int);
178: void lwp_continue(struct lwp *);
179: void cpu_setfunc(struct lwp *, void (*)(void *), void *);
180: void startlwp(void *);
181: void upcallret(struct lwp *);
182: void lwp_exit (struct lwp *);
183: void lwp_exit2 (struct lwp *);
184: struct lwp *proc_representative_lwp(struct proc *);
185: #endif /* _KERNEL */
186:
187: /* Flags for _lwp_create(), as per Solaris. */
188:
189: #define LWP_DETACHED 0x00000040
190: #define LWP_SUSPENDED 0x00000080
191: #define __LWP_ASLWP 0x00000100 /* XXX more icky signal semantics */
192:
193: #endif /* !_SYS_LWP_H_ */
194:
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