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1febd21d3f
a _REDIR_TIME64 macro is introduced, which the arch's alltypes.h is expected to define, to control redirection of symbol names for interfaces that involve time_t and derived types. this ensures that object files will only be linked to libc interfaces matching the ABI whose headers they were compiled against. along with time32 compat shims, which will be introduced separately, the redirection also makes it possible for a single libc (static or shared) to be used with object files produced with either the old (32-bit time_t) headers or the new ones after 64-bit time_t switchover takes place. mixing of such object files (or shared libraries) in the same program will also be possible, but must be done with care; ABI between libc and a consumer of the libc interfaces is guaranteed to match by the the symbol name redirection, but pairwise ABI between consumers of libc that define interfaces between each other in terms of time_t is not guaranteed to match. this change adds a dependency on an additional "GNU C" feature to the public headers for existing 32-bit archs, which is generally undesirable; however, the feature is one which glibc has depended on for a long time, and thus which any viable alternative compiler is going to need to provide. 64-bit archs are not affected, nor will future 32-bit archs be, regardless of whether they are "new" on the kernel side (e.g. riscv32) or just newly-added (e.g. a new sparc or xtensa port). the same applies to newly-added ABIs for existing machine-level archs.
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#ifndef _AIO_H
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#define _AIO_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#include <signal.h>
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#include <time.h>
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#define __NEED_ssize_t
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#define __NEED_off_t
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#include <bits/alltypes.h>
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struct aiocb {
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int aio_fildes, aio_lio_opcode, aio_reqprio;
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volatile void *aio_buf;
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size_t aio_nbytes;
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struct sigevent aio_sigevent;
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void *__td;
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int __lock[2];
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volatile int __err;
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ssize_t __ret;
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off_t aio_offset;
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void *__next, *__prev;
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char __dummy4[32-2*sizeof(void *)];
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};
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#define AIO_CANCELED 0
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#define AIO_NOTCANCELED 1
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#define AIO_ALLDONE 2
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#define LIO_READ 0
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#define LIO_WRITE 1
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#define LIO_NOP 2
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#define LIO_WAIT 0
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#define LIO_NOWAIT 1
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int aio_read(struct aiocb *);
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int aio_write(struct aiocb *);
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int aio_error(const struct aiocb *);
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ssize_t aio_return(struct aiocb *);
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int aio_cancel(int, struct aiocb *);
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int aio_suspend(const struct aiocb *const [], int, const struct timespec *);
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int aio_fsync(int, struct aiocb *);
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int lio_listio(int, struct aiocb *__restrict const *__restrict, int, struct sigevent *__restrict);
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#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
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#define aiocb64 aiocb
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#define aio_read64 aio_read
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#define aio_write64 aio_write
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#define aio_error64 aio_error
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#define aio_return64 aio_return
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#define aio_cancel64 aio_cancel
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#define aio_suspend64 aio_suspend
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#define aio_fsync64 aio_fsync
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#define lio_listio64 lio_listio
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#define off64_t off_t
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#endif
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#if _REDIR_TIME64
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__REDIR(aio_suspend, __aio_suspend_time64);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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