1 #include "u.h"
2 #include <errno.h>
3 #include <sys/time.h>
4 #include <sys/types.h>
5 #include <sys/wait.h>
6 #include <sched.h>
7 #include <signal.h>
8 #if !defined(__OpenBSD__)
9 #	include <ucontext.h>
10 #endif
11 #include <sys/utsname.h>
12 #include "libc.h"
13 #include "thread.h"
14 
15 #if defined(__FreeBSD__) && __FreeBSD__ < 5
16 extern	int		getmcontext(mcontext_t*);
17 extern	void		setmcontext(mcontext_t*);
18 #define	setcontext(u)	setmcontext(&(u)->uc_mcontext)
19 #define	getcontext(u)	getmcontext(&(u)->uc_mcontext)
20 extern	int		swapcontext(ucontext_t*, ucontext_t*);
21 extern	void		makecontext(ucontext_t*, void(*)(), int, ...);
22 #endif
23 
24 #if defined(__APPLE__)
25 #	define mcontext libthread_mcontext
26 #	define mcontext_t libthread_mcontext_t
27 #	define ucontext libthread_ucontext
28 #	define ucontext_t libthread_ucontext_t
29 #	include "power-ucontext.h"
30 #endif
31 
32 #if defined(__OpenBSD__)
33 #	define mcontext libthread_mcontext
34 #	define mcontext_t libthread_mcontext_t
35 #	define ucontext libthread_ucontext
36 #	define ucontext_t libthread_ucontext_t
37 #	if defined __i386__
38 #		include "386-ucontext.h"
39 #	else
40 #		include "power-ucontext.h"
41 #	endif
42 extern pid_t rfork_thread(int, void*, int(*)(void*), void*);
43 #endif
44 
45 #if defined(__arm__)
46 int getmcontext(mcontext_t*);
47 void setmcontext(const mcontext_t*);
48 #define	setcontext(u)	setmcontext(&(u)->uc_mcontext)
49 #define	getcontext(u)	getmcontext(&(u)->uc_mcontext)
50 #endif
51 
52 typedef struct Context Context;
53 typedef struct Execjob Execjob;
54 typedef struct Proc Proc;
55 typedef struct _Procrendez _Procrendez;
56 
57 typedef struct Jmp Jmp;
58 struct Jmp
59 {
60 	p9jmp_buf b;
61 };
62 
63 enum
64 {
65 	STACK = 8192
66 };
67 
68 struct Context
69 {
70 	ucontext_t	uc;
71 };
72 
73 struct Execjob
74 {
75 	int *fd;
76 	char *cmd;
77 	char **argv;
78 	Channel *c;
79 };
80 
81 struct _Thread
82 {
83 	_Thread	*next;
84 	_Thread	*prev;
85 	_Thread	*allnext;
86 	_Thread	*allprev;
87 	Context	context;
88 	uint	id;
89 	uchar	*stk;
90 	uint	stksize;
91 	int		exiting;
92 	void	(*startfn)(void*);
93 	void	*startarg;
94 	Proc	*proc;
95 	char	name[256];
96 	char	state[256];
97 	void *udata;
98 };
99 
100 struct _Procrendez
101 {
102 	Lock		*l;
103 	int		asleep;
104 #ifdef PLAN9PORT_USING_PTHREADS
105 	pthread_cond_t	cond;
106 #else
107 	int		pid;
108 #endif
109 };
110 
111 extern	void	_procsleep(_Procrendez*);
112 extern	void	_procwakeup(_Procrendez*);
113 extern	void	_procwakeupandunlock(_Procrendez*);
114 
115 struct Proc
116 {
117 	Proc		*next;
118 	Proc		*prev;
119 	char		msg[128];
120 #ifdef PLAN9PORT_USING_PTHREADS
121 	pthread_t	osprocid;
122 #else
123 	int		osprocid;
124 #endif
125 	Lock		lock;
126 	int			nswitch;
127 	_Thread		*thread;
128 	_Threadlist	runqueue;
129 	_Threadlist	allthreads;
130 	uint		nthread;
131 	uint		sysproc;
132 	_Procrendez	runrend;
133 	Context	schedcontext;
134 	void		*udata;
135 	Jmp		sigjmp;
136 	int		mainproc;
137 };
138 
139 #define proc() _threadproc()
140 #define setproc(p) _threadsetproc(p)
141 
142 extern Proc *_threadprocs;
143 extern Lock _threadprocslock;
144 extern Proc *_threadexecproc;
145 extern Channel *_threadexecchan;
146 extern QLock _threadexeclock;
147 extern Channel *_dowaitchan;
148 
149 extern void _procstart(Proc*, void (*fn)(Proc*));
150 extern _Thread *_threadcreate(Proc*, void(*fn)(void*), void*, uint);
151 extern void _threadexit(void);
152 extern Proc *_threadproc(void);
153 extern void _threadsetproc(Proc*);
154 extern int _threadlock(Lock*, int, ulong);
155 extern void _threadunlock(Lock*, ulong);
156 extern void _pthreadinit(void);
157 extern int _threadspawn(int*, char*, char**);
158 extern int _runthreadspawn(int*, char*, char**);
159 extern void _threadsetupdaemonize(void);
160 extern void _threaddodaemonize(char*);
161 extern void _threadpexit(void);
162 extern void _threaddaemonize(void);