The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/systm.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1988, 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  * (c) UNIX System Laboratories, Inc.
    7  * All or some portions of this file are derived from material licensed
    8  * to the University of California by American Telephone and Telegraph
    9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   10  * the permission of UNIX System Laboratories, Inc.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)systm.h     8.7 (Berkeley) 3/29/95
   37  * $FreeBSD$
   38  */
   39 
   40 #ifndef _SYS_SYSTM_H_
   41 #define _SYS_SYSTM_H_
   42 
   43 #include <sys/cdefs.h>
   44 #include <machine/atomic.h>
   45 #include <machine/cpufunc.h>
   46 #include <sys/callout.h>
   47 #include <sys/queue.h>
   48 #include <sys/stdint.h>         /* for people using printf mainly */
   49 
   50 __NULLABILITY_PRAGMA_PUSH
   51 
   52 extern int cold;                /* nonzero if we are doing a cold boot */
   53 extern int suspend_blocked;     /* block suspend due to pending shutdown */
   54 extern int rebooting;           /* kern_reboot() has been called. */
   55 extern const char *panicstr;    /* panic message */
   56 extern char version[];          /* system version */
   57 extern char compiler_version[]; /* compiler version */
   58 extern char copyright[];        /* system copyright */
   59 extern int kstack_pages;        /* number of kernel stack pages */
   60 
   61 extern u_long pagesizes[];      /* supported page sizes */
   62 extern long physmem;            /* physical memory */
   63 extern long realmem;            /* 'real' memory */
   64 
   65 extern char *rootdevnames[2];   /* names of possible root devices */
   66 
   67 extern int boothowto;           /* reboot flags, from console subsystem */
   68 extern int bootverbose;         /* nonzero to print verbose messages */
   69 
   70 extern int maxusers;            /* system tune hint */
   71 extern int ngroups_max;         /* max # of supplemental groups */
   72 extern int vm_guest;            /* Running as virtual machine guest? */
   73 
   74 /*
   75  * Detected virtual machine guest types. The intention is to expand
   76  * and/or add to the VM_GUEST_VM type if specific VM functionality is
   77  * ever implemented (e.g. vendor-specific paravirtualization features).
   78  * Keep in sync with vm_guest_sysctl_names[].
   79  */
   80 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
   81                 VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_LAST };
   82 
   83 /*
   84  * These functions need to be declared before the KASSERT macro is invoked in
   85  * !KASSERT_PANIC_OPTIONAL builds, so their declarations are sort of out of
   86  * place compared to other function definitions in this header.  On the other
   87  * hand, this header is a bit disorganized anyway.
   88  */
   89 void    panic(const char *, ...) __dead2 __printflike(1, 2);
   90 void    vpanic(const char *, __va_list) __dead2 __printflike(1, 0);
   91 
   92 #if defined(WITNESS) || defined(INVARIANT_SUPPORT)
   93 #ifdef KASSERT_PANIC_OPTIONAL
   94 void    kassert_panic(const char *fmt, ...)  __printflike(1, 2);
   95 #else
   96 #define kassert_panic   panic
   97 #endif
   98 #endif
   99 
  100 #ifdef  INVARIANTS              /* The option is always available */
  101 #define KASSERT(exp,msg) do {                                           \
  102         if (__predict_false(!(exp)))                                    \
  103                 kassert_panic msg;                                      \
  104 } while (0)
  105 #define VNASSERT(exp, vp, msg) do {                                     \
  106         if (__predict_false(!(exp))) {                                  \
  107                 vn_printf(vp, "VNASSERT failed\n");                     \
  108                 kassert_panic msg;                                      \
  109         }                                                               \
  110 } while (0)
  111 #define __assert_unreachable() \
  112         panic("executing segment marked as unreachable at %s:%d (%s)\n", \
  113             __FILE__, __LINE__, __func__)
  114 #else
  115 #define KASSERT(exp,msg) do { \
  116 } while (0)
  117 
  118 #define VNASSERT(exp, vp, msg) do { \
  119 } while (0)
  120 #define __assert_unreachable()  __unreachable()
  121 #endif
  122 
  123 #ifndef CTASSERT        /* Allow lint to override */
  124 #define CTASSERT(x)     _Static_assert(x, "compile-time assertion failed")
  125 #endif
  126 
  127 #if defined(_KERNEL)
  128 #include <sys/param.h>          /* MAXCPU */
  129 #include <sys/pcpu.h>           /* curthread */
  130 #include <sys/kpilite.h>
  131 #endif
  132 
  133 /*
  134  * Assert that a pointer can be loaded from memory atomically.
  135  *
  136  * This assertion enforces stronger alignment than necessary.  For example,
  137  * on some architectures, atomicity for unaligned loads will depend on
  138  * whether or not the load spans multiple cache lines.
  139  */
  140 #define ASSERT_ATOMIC_LOAD_PTR(var, msg)                                \
  141         KASSERT(sizeof(var) == sizeof(void *) &&                        \
  142             ((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg)
  143 
  144 /*
  145  * Assert that a thread is in critical(9) section.
  146  */
  147 #define CRITICAL_ASSERT(td)                                             \
  148         KASSERT((td)->td_critnest >= 1, ("Not in critical section"));
  149  
  150 /*
  151  * If we have already panic'd and this is the thread that called
  152  * panic(), then don't block on any mutexes but silently succeed.
  153  * Otherwise, the kernel will deadlock since the scheduler isn't
  154  * going to run the thread that holds any lock we need.
  155  */
  156 #define SCHEDULER_STOPPED_TD(td)  ({                                    \
  157         MPASS((td) == curthread);                                       \
  158         __predict_false((td)->td_stopsched);                            \
  159 })
  160 #define SCHEDULER_STOPPED() SCHEDULER_STOPPED_TD(curthread)
  161 
  162 /*
  163  * Align variables.
  164  */
  165 #define __read_mostly           __section(".data.read_mostly")
  166 #define __read_frequently       __section(".data.read_frequently")
  167 #define __exclusive_cache_line  __aligned(CACHE_LINE_SIZE) \
  168                                     __section(".data.exclusive_cache_line")
  169 /*
  170  * XXX the hints declarations are even more misplaced than most declarations
  171  * in this file, since they are needed in one file (per arch) and only used
  172  * in two files.
  173  * XXX most of these variables should be const.
  174  */
  175 extern int osreldate;
  176 extern bool dynamic_kenv;
  177 extern struct mtx kenv_lock;
  178 extern char *kern_envp;
  179 extern char *md_envp;
  180 extern char static_env[];
  181 extern char static_hints[];     /* by config for now */
  182 
  183 extern char **kenvp;
  184 
  185 extern const void *zero_region; /* address space maps to a zeroed page  */
  186 
  187 extern int unmapped_buf_allowed;
  188 
  189 #ifdef __LP64__
  190 #define IOSIZE_MAX              iosize_max()
  191 #define DEVFS_IOSIZE_MAX        devfs_iosize_max()
  192 #else
  193 #define IOSIZE_MAX              SSIZE_MAX
  194 #define DEVFS_IOSIZE_MAX        SSIZE_MAX
  195 #endif
  196 
  197 /*
  198  * General function declarations.
  199  */
  200 
  201 struct inpcb;
  202 struct lock_object;
  203 struct malloc_type;
  204 struct mtx;
  205 struct proc;
  206 struct socket;
  207 struct thread;
  208 struct tty;
  209 struct ucred;
  210 struct uio;
  211 struct _jmp_buf;
  212 struct trapframe;
  213 struct eventtimer;
  214 
  215 int     setjmp(struct _jmp_buf *) __returns_twice;
  216 void    longjmp(struct _jmp_buf *, int) __dead2;
  217 int     dumpstatus(vm_offset_t addr, off_t count);
  218 int     nullop(void);
  219 int     eopnotsupp(void);
  220 int     ureadc(int, struct uio *);
  221 void    hashdestroy(void *, struct malloc_type *, u_long);
  222 void    *hashinit(int count, struct malloc_type *type, u_long *hashmask);
  223 void    *hashinit_flags(int count, struct malloc_type *type,
  224     u_long *hashmask, int flags);
  225 #define HASH_NOWAIT     0x00000001
  226 #define HASH_WAITOK     0x00000002
  227 
  228 void    *phashinit(int count, struct malloc_type *type, u_long *nentries);
  229 void    *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
  230     int flags);
  231 void    g_waitidle(void);
  232 
  233 void    cpu_boot(int);
  234 void    cpu_flush_dcache(void *, size_t);
  235 void    cpu_rootconf(void);
  236 void    critical_enter_KBI(void);
  237 void    critical_exit_KBI(void);
  238 void    critical_exit_preempt(void);
  239 void    init_param1(void);
  240 void    init_param2(long physpages);
  241 void    init_static_kenv(char *, size_t);
  242 void    tablefull(const char *);
  243 
  244 #if defined(KLD_MODULE) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
  245 #define critical_enter() critical_enter_KBI()
  246 #define critical_exit() critical_exit_KBI()
  247 #else
  248 static __inline void
  249 critical_enter(void)
  250 {
  251         struct thread_lite *td;
  252 
  253         td = (struct thread_lite *)curthread;
  254         td->td_critnest++;
  255         __compiler_membar();
  256 }
  257 
  258 static __inline void
  259 critical_exit(void)
  260 {
  261         struct thread_lite *td;
  262 
  263         td = (struct thread_lite *)curthread;
  264         KASSERT(td->td_critnest != 0,
  265             ("critical_exit: td_critnest == 0"));
  266         __compiler_membar();
  267         td->td_critnest--;
  268         __compiler_membar();
  269         if (__predict_false(td->td_owepreempt))
  270                 critical_exit_preempt();
  271 
  272 }
  273 #endif
  274 
  275 
  276 #ifdef  EARLY_PRINTF
  277 typedef void early_putc_t(int ch);
  278 extern early_putc_t *early_putc;
  279 #endif
  280 int     kvprintf(char const *, void (*)(int, void*), void *, int,
  281             __va_list) __printflike(1, 0);
  282 void    log(int, const char *, ...) __printflike(2, 3);
  283 void    log_console(struct uio *);
  284 void    vlog(int, const char *, __va_list) __printflike(2, 0);
  285 int     asprintf(char **ret, struct malloc_type *mtp, const char *format, 
  286             ...) __printflike(3, 4);
  287 int     printf(const char *, ...) __printflike(1, 2);
  288 int     snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
  289 int     sprintf(char *buf, const char *, ...) __printflike(2, 3);
  290 int     uprintf(const char *, ...) __printflike(1, 2);
  291 int     vprintf(const char *, __va_list) __printflike(1, 0);
  292 int     vasprintf(char **ret, struct malloc_type *mtp, const char *format,
  293             __va_list ap) __printflike(3, 0);
  294 int     vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
  295 int     vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
  296 int     vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
  297 int     ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
  298 int     sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
  299 int     vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list)  __scanflike(2, 0);
  300 long    strtol(const char *, char **, int);
  301 u_long  strtoul(const char *, char **, int);
  302 quad_t  strtoq(const char *, char **, int);
  303 u_quad_t strtouq(const char *, char **, int);
  304 void    tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
  305 void    vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
  306 void    hexdump(const void *ptr, int length, const char *hdr, int flags);
  307 #define HD_COLUMN_MASK  0xff
  308 #define HD_DELIM_MASK   0xff00
  309 #define HD_OMIT_COUNT   (1 << 16)
  310 #define HD_OMIT_HEX     (1 << 17)
  311 #define HD_OMIT_CHARS   (1 << 18)
  312 
  313 #define ovbcopy(f, t, l) bcopy((f), (t), (l))
  314 void    bcopy(const void * _Nonnull from, void * _Nonnull to, size_t len);
  315 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
  316 void    bzero(void * _Nonnull buf, size_t len);
  317 #define bzero(buf, len) __builtin_memset((buf), 0, (len))
  318 void    explicit_bzero(void * _Nonnull, size_t);
  319 int     bcmp(const void *b1, const void *b2, size_t len);
  320 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
  321 
  322 void    *memset(void * _Nonnull buf, int c, size_t len);
  323 #define memset(buf, c, len) __builtin_memset((buf), (c), (len))
  324 void    *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
  325 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
  326 void    *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
  327 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
  328 int     memcmp(const void *b1, const void *b2, size_t len);
  329 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
  330 
  331 void    *memset_early(void * _Nonnull buf, int c, size_t len);
  332 #define bzero_early(buf, len) memset_early((buf), 0, (len))
  333 void    *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
  334 void    *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
  335 #define bcopy_early(from, to, len) memmove_early((to), (from), (len))
  336 
  337 int     copystr(const void * _Nonnull __restrict kfaddr,
  338             void * _Nonnull __restrict kdaddr, size_t len,
  339             size_t * __restrict lencopied);
  340 int     copyinstr(const void * __restrict udaddr,
  341             void * _Nonnull __restrict kaddr, size_t len,
  342             size_t * __restrict lencopied);
  343 int     copyin(const void * __restrict udaddr,
  344             void * _Nonnull __restrict kaddr, size_t len);
  345 int     copyin_nofault(const void * __restrict udaddr,
  346             void * _Nonnull __restrict kaddr, size_t len);
  347 int     copyout(const void * _Nonnull __restrict kaddr,
  348             void * __restrict udaddr, size_t len);
  349 int     copyout_nofault(const void * _Nonnull __restrict kaddr,
  350             void * __restrict udaddr, size_t len);
  351 
  352 int     fubyte(volatile const void *base);
  353 long    fuword(volatile const void *base);
  354 int     fuword16(volatile const void *base);
  355 int32_t fuword32(volatile const void *base);
  356 int64_t fuword64(volatile const void *base);
  357 int     fueword(volatile const void *base, long *val);
  358 int     fueword32(volatile const void *base, int32_t *val);
  359 int     fueword64(volatile const void *base, int64_t *val);
  360 int     subyte(volatile void *base, int byte);
  361 int     suword(volatile void *base, long word);
  362 int     suword16(volatile void *base, int word);
  363 int     suword32(volatile void *base, int32_t word);
  364 int     suword64(volatile void *base, int64_t word);
  365 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
  366 u_long  casuword(volatile u_long *p, u_long oldval, u_long newval);
  367 int     casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
  368             uint32_t newval);
  369 int     casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
  370             u_long newval);
  371 
  372 void    realitexpire(void *);
  373 
  374 int     sysbeep(int hertz, int period);
  375 
  376 void    hardclock(int cnt, int usermode);
  377 void    hardclock_sync(int cpu);
  378 void    softclock(void *);
  379 void    statclock(int cnt, int usermode);
  380 void    profclock(int cnt, int usermode, uintfptr_t pc);
  381 
  382 int     hardclockintr(void);
  383 
  384 void    startprofclock(struct proc *);
  385 void    stopprofclock(struct proc *);
  386 void    cpu_startprofclock(void);
  387 void    cpu_stopprofclock(void);
  388 void    suspendclock(void);
  389 void    resumeclock(void);
  390 sbintime_t      cpu_idleclock(void);
  391 void    cpu_activeclock(void);
  392 void    cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
  393 void    cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
  394 extern int      cpu_disable_c2_sleep;
  395 extern int      cpu_disable_c3_sleep;
  396 
  397 char    *kern_getenv(const char *name);
  398 void    freeenv(char *env);
  399 int     getenv_int(const char *name, int *data);
  400 int     getenv_uint(const char *name, unsigned int *data);
  401 int     getenv_long(const char *name, long *data);
  402 int     getenv_ulong(const char *name, unsigned long *data);
  403 int     getenv_string(const char *name, char *data, int size);
  404 int     getenv_int64(const char *name, int64_t *data);
  405 int     getenv_uint64(const char *name, uint64_t *data);
  406 int     getenv_quad(const char *name, quad_t *data);
  407 int     kern_setenv(const char *name, const char *value);
  408 int     kern_unsetenv(const char *name);
  409 int     testenv(const char *name);
  410 
  411 int     getenv_array(const char *name, void *data, int size, int *psize,
  412     int type_size, bool allow_signed);
  413 #define GETENV_UNSIGNED false   /* negative numbers not allowed */
  414 #define GETENV_SIGNED   true    /* negative numbers allowed */
  415 
  416 typedef uint64_t (cpu_tick_f)(void);
  417 void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
  418 extern cpu_tick_f *cpu_ticks;
  419 uint64_t cpu_tickrate(void);
  420 uint64_t cputick2usec(uint64_t tick);
  421 
  422 #ifdef APM_FIXUP_CALLTODO
  423 struct timeval;
  424 void    adjust_timeout_calltodo(struct timeval *time_change);
  425 #endif /* APM_FIXUP_CALLTODO */
  426 
  427 #include <sys/libkern.h>
  428 
  429 /* Initialize the world */
  430 void    consinit(void);
  431 void    cpu_initclocks(void);
  432 void    cpu_initclocks_bsp(void);
  433 void    cpu_initclocks_ap(void);
  434 void    usrinfoinit(void);
  435 
  436 /* Finalize the world */
  437 void    kern_reboot(int) __dead2;
  438 void    shutdown_nice(int);
  439 
  440 /* Timeouts */
  441 typedef void timeout_t(void *); /* timeout function type */
  442 #define CALLOUT_HANDLE_INITIALIZER(handle)      \
  443         { NULL }
  444 
  445 void    callout_handle_init(struct callout_handle *);
  446 struct  callout_handle timeout(timeout_t *, void *, int);
  447 void    untimeout(timeout_t *, void *, struct callout_handle);
  448 
  449 /* Stubs for obsolete functions that used to be for interrupt management */
  450 static __inline intrmask_t      splbio(void)            { return 0; }
  451 static __inline intrmask_t      splcam(void)            { return 0; }
  452 static __inline intrmask_t      splclock(void)          { return 0; }
  453 static __inline intrmask_t      splhigh(void)           { return 0; }
  454 static __inline intrmask_t      splimp(void)            { return 0; }
  455 static __inline intrmask_t      splnet(void)            { return 0; }
  456 static __inline intrmask_t      spltty(void)            { return 0; }
  457 static __inline void            splx(intrmask_t ipl __unused)   { return; }
  458 
  459 /*
  460  * Common `proc' functions are declared here so that proc.h can be included
  461  * less often.
  462  */
  463 int     _sleep(void * _Nonnull chan, struct lock_object *lock, int pri,
  464            const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
  465 #define msleep(chan, mtx, pri, wmesg, timo)                             \
  466         _sleep((chan), &(mtx)->lock_object, (pri), (wmesg),             \
  467             tick_sbt * (timo), 0, C_HARDCLOCK)
  468 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags)                \
  469         _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
  470             (flags))
  471 int     msleep_spin_sbt(void * _Nonnull chan, struct mtx *mtx,
  472             const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
  473 #define msleep_spin(chan, mtx, wmesg, timo)                             \
  474         msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo),      \
  475             0, C_HARDCLOCK)
  476 int     pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
  477             int flags);
  478 #define pause(wmesg, timo)                                              \
  479         pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK)
  480 #define pause_sig(wmesg, timo)                                          \
  481         pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
  482 #define tsleep(chan, pri, wmesg, timo)                                  \
  483         _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo),         \
  484             0, C_HARDCLOCK)
  485 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags)                     \
  486         _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
  487 void    wakeup(void * chan);
  488 void    wakeup_one(void * chan);
  489 void    wakeup_any(void * chan);
  490 
  491 /*
  492  * Common `struct cdev *' stuff are declared here to avoid #include poisoning
  493  */
  494 
  495 struct cdev;
  496 dev_t dev2udev(struct cdev *x);
  497 const char *devtoname(struct cdev *cdev);
  498 
  499 #ifdef __LP64__
  500 size_t  devfs_iosize_max(void);
  501 size_t  iosize_max(void);
  502 #endif
  503 
  504 int poll_no_poll(int events);
  505 
  506 /* XXX: Should be void nanodelay(u_int nsec); */
  507 void    DELAY(int usec);
  508 
  509 /* Root mount holdback API */
  510 struct root_hold_token {
  511         int                             flags;
  512         const char                      *who;
  513         TAILQ_ENTRY(root_hold_token)    list;
  514 };
  515 
  516 struct root_hold_token *root_mount_hold(const char *identifier);
  517 void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
  518 void root_mount_rel(struct root_hold_token *h);
  519 int root_mounted(void);
  520 
  521 
  522 /*
  523  * Unit number allocation API. (kern/subr_unit.c)
  524  */
  525 struct unrhdr;
  526 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
  527 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
  528 void delete_unrhdr(struct unrhdr *uh);
  529 void clear_unrhdr(struct unrhdr *uh);
  530 void clean_unrhdr(struct unrhdr *uh);
  531 void clean_unrhdrl(struct unrhdr *uh);
  532 int alloc_unr(struct unrhdr *uh);
  533 int alloc_unr_specific(struct unrhdr *uh, u_int item);
  534 int alloc_unrl(struct unrhdr *uh);
  535 void free_unr(struct unrhdr *uh, u_int item);
  536 
  537 #ifndef __LP64__
  538 #define UNR64_LOCKED
  539 #endif
  540 
  541 struct unrhdr64 {
  542         uint64_t        counter;
  543 };
  544 
  545 static __inline void
  546 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
  547 {
  548 
  549         unr64->counter = low;
  550 }
  551 
  552 #ifdef UNR64_LOCKED
  553 uint64_t alloc_unr64(struct unrhdr64 *);
  554 #else
  555 static __inline uint64_t
  556 alloc_unr64(struct unrhdr64 *unr64)
  557 {
  558 
  559         return (atomic_fetchadd_64(&unr64->counter, 1));
  560 }
  561 #endif
  562 
  563 void    intr_prof_stack_use(struct thread *td, struct trapframe *frame);
  564 
  565 void counted_warning(unsigned *counter, const char *msg);
  566 
  567 /*
  568  * APIs to manage deprecation and obsolescence.
  569  */
  570 struct device;
  571 void _gone_in(int major, const char *msg);
  572 void _gone_in_dev(struct device *dev, int major, const char *msg);
  573 #ifdef NO_OBSOLETE_CODE
  574 #define __gone_ok(m, msg)                                        \
  575         _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)),    \
  576             "Obsolete code" msg);
  577 #else
  578 #define __gone_ok(m, msg)
  579 #endif
  580 #define gone_in(major, msg)             __gone_ok(major, msg) _gone_in(major, msg)
  581 #define gone_in_dev(dev, major, msg)    __gone_ok(major, msg) _gone_in_dev(dev, major, msg)
  582 #define gone_by_fcp101_dev(dev)                                         \
  583         gone_in_dev((dev), 13,                                          \
  584             "see https://github.com/freebsd/fcp/blob/master/fcp-0101.md")
  585 
  586 #ifdef _KERNEL
  587 #if defined(INVARIANTS) || defined(WITNESS)
  588 #define __diagused
  589 #else
  590 #define __diagused      __unused
  591 #endif
  592 
  593 #endif /* _KERNEL */
  594 
  595 __NULLABILITY_PRAGMA_POP
  596 
  597 #endif /* !_SYS_SYSTM_H_ */

Cache object: 04ad9b4216cbef5080a14e6028e98d49


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.