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The name 'valid_timeval64_to_timeval' suggest conversion of struct __timeval64 to struct timeval (as in ./include/time.h). As on the alpha the struct timeval supports 64 bit time, it seems more feasible to emphasis struct timeval32 in the conversion function name. Hence the helper function naming change to 'valid_timeval_to_timeval32'. Build tests: ./src/scripts/build-many-glibcs.py glibcs Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/* Compatibility definitions for `struct timeval' with 32-bit time_t.
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Copyright (C) 2019-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _TV32_COMPAT_H
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#define _TV32_COMPAT_H 1
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#include <features.h>
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#include <bits/types.h>
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#include <bits/types/time_t.h>
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#include <bits/types/struct_timeval.h>
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#include <bits/types/struct_timespec.h>
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#include <bits/types/struct_rusage.h>
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#include <stdint.h> // for INT32_MAX
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#include <string.h> // for memset
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#define TV_USEC_MAX 999999 // 10**6 - 1
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/* A version of 'struct timeval' with 32-bit time_t. */
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struct timeval32
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{
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int32_t tv_sec;
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int32_t tv_usec;
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};
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/* Structures containing 'struct timeval' with 32-bit time_t. */
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struct itimerval32
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{
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struct timeval32 it_interval;
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struct timeval32 it_value;
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};
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struct rusage32
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{
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struct timeval32 ru_utime; /* user time used */
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struct timeval32 ru_stime; /* system time used */
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long ru_maxrss; /* maximum resident set size */
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long ru_ixrss; /* integral shared memory size */
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long ru_idrss; /* integral unshared data size */
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long ru_isrss; /* integral unshared stack size */
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long ru_minflt; /* page reclaims */
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long ru_majflt; /* page faults */
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long ru_nswap; /* swaps */
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long ru_inblock; /* block input operations */
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long ru_oublock; /* block output operations */
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long ru_msgsnd; /* messages sent */
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long ru_msgrcv; /* messages received */
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long ru_nsignals; /* signals received */
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long ru_nvcsw; /* voluntary context switches */
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long ru_nivcsw; /* involuntary " */
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};
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/* Conversion functions. If the seconds field of a timeval32 would
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overflow, they write { INT32_MAX, TV_USEC_MAX } to the output. */
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static inline struct timeval
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valid_timeval32_to_timeval (const struct timeval32 tv)
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{
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return (struct timeval) { tv.tv_sec, tv.tv_usec };
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}
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static inline struct timeval32
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valid_timeval_to_timeval32 (const struct timeval tv64)
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{
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if (__glibc_unlikely (tv64.tv_sec > (time_t) INT32_MAX))
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return (struct timeval32) { INT32_MAX, TV_USEC_MAX};
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return (struct timeval32) { tv64.tv_sec, tv64.tv_usec };
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}
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static inline struct timespec
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valid_timeval32_to_timespec (const struct timeval32 tv)
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{
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return (struct timespec) { tv.tv_sec, tv.tv_usec * 1000 };
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}
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static inline struct timeval32
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valid_timespec_to_timeval32 (const struct timespec ts)
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{
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return (struct timeval32) { (time_t) ts.tv_sec, ts.tv_nsec / 1000 };
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}
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static inline void
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rusage64_to_rusage32 (struct rusage32 *restrict r32,
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const struct rusage *restrict r64)
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{
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/* Make sure the entire output structure is cleared, including
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padding and reserved fields. */
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memset (r32, 0, sizeof *r32);
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r32->ru_utime = valid_timeval_to_timeval32 (r64->ru_utime);
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r32->ru_stime = valid_timeval_to_timeval32 (r64->ru_stime);
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r32->ru_maxrss = r64->ru_maxrss;
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r32->ru_ixrss = r64->ru_ixrss;
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r32->ru_idrss = r64->ru_idrss;
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r32->ru_isrss = r64->ru_isrss;
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r32->ru_minflt = r64->ru_minflt;
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r32->ru_majflt = r64->ru_majflt;
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r32->ru_nswap = r64->ru_nswap;
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r32->ru_inblock = r64->ru_inblock;
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r32->ru_oublock = r64->ru_oublock;
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r32->ru_msgsnd = r64->ru_msgsnd;
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r32->ru_msgrcv = r64->ru_msgrcv;
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r32->ru_nsignals = r64->ru_nsignals;
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r32->ru_nvcsw = r64->ru_nvcsw;
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r32->ru_nivcsw = r64->ru_nivcsw;
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}
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#endif /* tv32-compat.h */
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