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#include "u.h"
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sched.h>
#include <signal.h>
#if !defined(__OpenBSD__)
# if defined(__APPLE__)
# define _XOPEN_SOURCE /* for Snow Leopard */
# endif
# include <ucontext.h>
#endif
#include <sys/utsname.h>
#include "libc.h"
#include "thread.h"
#if defined(__APPLE__)
/*
* OS X before 10.5 (Leopard) does not provide
* swapcontext nor makecontext, so we have to use our own.
* In theory, Leopard does provide them, but when we use
* them, they seg fault. Maybe we're using them wrong.
* So just use our own versions, even on Leopard.
*/
# define mcontext libthread_mcontext
# define mcontext_t libthread_mcontext_t
# define ucontext libthread_ucontext
# define ucontext_t libthread_ucontext_t
# define swapcontext libthread_swapcontext
# define makecontext libthread_makecontext
# if defined(__i386__)
# include "386-ucontext.h"
# elif defined(__x86_64__)
# include "x86_64-ucontext.h"
# elif defined(__ppc__) || defined(__power__)
# include "power-ucontext.h"
# else
# error "unknown architecture"
# endif
#endif
#if defined(__OpenBSD__)
# define mcontext libthread_mcontext
# define mcontext_t libthread_mcontext_t
# define ucontext libthread_ucontext
# define ucontext_t libthread_ucontext_t
# if defined __i386__
# include "386-ucontext.h"
# elif defined __amd64__
# include "x86_64-ucontext.h"
# else
# include "power-ucontext.h"
# endif
extern pid_t rfork_thread(int, void*, int(*)(void*), void*);
#endif
#if defined(__arm__)
int mygetmcontext(ulong*);
void mysetmcontext(const ulong*);
#define setcontext(u) mysetmcontext(&(u)->uc_mcontext.arm_r0)
#define getcontext(u) mygetmcontext(&(u)->uc_mcontext.arm_r0)
#endif
typedef struct Context Context;
typedef struct Execjob Execjob;
typedef struct Proc Proc;
typedef struct _Procrendez _Procrendez;
typedef struct Jmp Jmp;
struct Jmp
{
p9jmp_buf b;
};
enum
{
STACK = 8192
};
struct Context
{
ucontext_t uc;
#ifdef __APPLE__
/*
* On Snow Leopard, etc., the context routines exist,
* so we use them, but apparently they write past the
* end of the ucontext_t. Sigh. We put some extra
* scratch space here for them.
*/
uchar buf[1024];
#endif
};
struct Execjob
{
int *fd;
char *cmd;
char **argv;
char *dir;
Channel *c;
};
struct _Thread
{
_Thread *next;
_Thread *prev;
_Thread *allnext;
_Thread *allprev;
Context context;
void (*startfn)(void*);
void *startarg;
uint id;
uchar *stk;
uint stksize;
int exiting;
Proc *proc;
char name[256];
char state[256];
void *udata;
Alt *alt;
};
struct _Procrendez
{
Lock *l;
int asleep;
#ifdef PLAN9PORT_USING_PTHREADS
pthread_cond_t cond;
#else
int pid;
#endif
};
extern void _procsleep(_Procrendez*);
extern void _procwakeup(_Procrendez*);
extern void _procwakeupandunlock(_Procrendez*);
struct Proc
{
Proc *next;
Proc *prev;
char msg[128];
#ifdef PLAN9PORT_USING_PTHREADS
pthread_t osprocid;
#else
int osprocid;
#endif
Lock lock;
int nswitch;
_Thread *thread;
_Thread *pinthread;
_Threadlist runqueue;
_Threadlist idlequeue;
_Threadlist allthreads;
uint nthread;
uint sysproc;
_Procrendez runrend;
Context schedcontext;
void *udata;
Jmp sigjmp;
int mainproc;
};
#define proc() _threadproc()
extern Proc *_threadprocs;
extern Lock _threadprocslock;
extern Proc *_threadexecproc;
extern Channel *_threadexecchan;
extern QLock _threadexeclock;
extern Channel *_dowaitchan;
extern void _procstart(Proc*, void (*fn)(Proc*));
extern _Thread *_threadcreate(Proc*, void(*fn)(void*), void*, uint);
extern void _procexit(void);
extern Proc *_threadproc(void);
extern void _threadsetproc(Proc*);
extern int _threadlock(Lock*, int, ulong);
extern void _threadunlock(Lock*, ulong);
extern void _pthreadinit(void);
extern int _threadspawn(int*, char*, char**, char*);
extern int _runthreadspawn(int*, char*, char**, char*);
extern void _threadsetupdaemonize(void);
extern void _threaddodaemonize(char*);
extern void _threadpexit(void);
extern void _threaddaemonize(void);
extern void *_threadstkalloc(int);
extern void _threadstkfree(void*, int);
#define USPALIGN(ucp, align) \
(void*)((((uintptr)(ucp)->uc_stack.ss_sp+(ucp)->uc_stack.ss_size)-(align))&~((align)-1))
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