2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/* asynchio.h - Asynchronous I/O Author: Kees J. Bot
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* 7 Jul 1997
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* Minix-vmd compatible asynchio(3) using BSD select(2).
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*/
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#ifndef _SYS__ASYNCHIO_H
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#define _SYS__ASYNCHIO_H
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#include <sys/select.h> /* for FD_SETSIZE */
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#define SEL_READ 0 /* Code for a read. */
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#define SEL_WRITE 1 /* Code for a write. */
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#define SEL_EXCEPT 2 /* Code for some exception. */
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#define SEL_NR 3 /* Number of codes. */
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struct _asynfd {
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int afd_seen; /* Set if we manage this descriptor. */
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int afd_flags; /* File flags by fcntl(fd, F_GETFL). */
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int afd_state[SEL_NR]; /* Operation state. */
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};
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typedef struct {
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int asyn_more; /* Set if more to do before blocking. */
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struct _asynfd asyn_afd[FD_SETSIZE];
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fd_set asyn_fdset[SEL_NR]; /* Select() fd sets. */
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} asynchio_t;
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#define ASYN_INPROGRESS EAGAIN /* Errno code telling "nothing yet." */
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#define ASYN_NONBLOCK 0x01 /* If asyn_wait() mustn't block. */
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struct timeval;
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void asyn_init(asynchio_t *_asyn);
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ssize_t asyn_read(asynchio_t *_asyn, int _fd, void *_buf, size_t _len);
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ssize_t asyn_write(asynchio_t *_asyn, int _fd, const void *_buf, size_t _len);
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int asyn_special(asynchio_t *_asyn, int _fd, int _op);
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int asyn_result(asynchio_t *_asyn, int _fd, int _op, int _result);
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int asyn_wait(asynchio_t *_asyn, int _flags, struct timeval *to);
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int asyn_cancel(asynchio_t *_asyn, int _fd, int _op);
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int asyn_pending(asynchio_t *_asyn, int _fd, int _op);
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int asyn_synch(asynchio_t *_asyn, int _fd);
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int asyn_close(asynchio_t *_asyn, int _fd);
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#endif /* _SYS__ASYNCHIO_H */
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