diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/tv32-compat.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/tv32-compat.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/tv32-compat.h b/sysdeps/unix/sysv/linux/alpha/tv32-compat.h new file mode 100644 index 0000000000..d0b4cdcef3 --- /dev/null +++ b/sysdeps/unix/sysv/linux/alpha/tv32-compat.h @@ -0,0 +1,112 @@ +/* Compatibility definitions for `struct timeval' with 32-bit time_t. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _TV32_COMPAT_H +#define _TV32_COMPAT_H 1 + +#include <features.h> + +#include <bits/types.h> +#include <bits/types/time_t.h> +#include <bits/types/struct_timeval.h> +#include <bits/types/struct_timespec.h> +#include <bits/types/struct_rusage.h> + +#include <stdint.h> // for INT32_MAX +#include <string.h> // for memset + +#define TV_USEC_MAX 999999 // 10**6 - 1 + +/* A version of 'struct timeval' with 32-bit time_t. */ +struct timeval32 +{ + int32_t tv_sec; + int32_t tv_usec; +}; + +/* Structures containing 'struct timeval' with 32-bit time_t. */ +struct itimerval32 +{ + struct timeval32 it_interval; + struct timeval32 it_value; +}; + +struct rusage32 +{ + struct timeval32 ru_utime; /* user time used */ + struct timeval32 ru_stime; /* system time used */ + long ru_maxrss; /* maximum resident set size */ + long ru_ixrss; /* integral shared memory size */ + long ru_idrss; /* integral unshared data size */ + long ru_isrss; /* integral unshared stack size */ + long ru_minflt; /* page reclaims */ + long ru_majflt; /* page faults */ + long ru_nswap; /* swaps */ + long ru_inblock; /* block input operations */ + long ru_oublock; /* block output operations */ + long ru_msgsnd; /* messages sent */ + long ru_msgrcv; /* messages received */ + long ru_nsignals; /* signals received */ + long ru_nvcsw; /* voluntary context switches */ + long ru_nivcsw; /* involuntary " */ +}; + +/* Conversion functions. If the seconds field of a timeval32 would + overflow, they write { INT32_MAX, TV_USEC_MAX } to the output. */ + +static inline struct timeval +valid_timeval_to_timeval64 (const struct timeval32 tv) +{ + return (struct timeval) { tv.tv_sec, tv.tv_usec }; +} + +static inline struct timeval32 +valid_timeval64_to_timeval (const struct timeval tv64) +{ + if (__glibc_unlikely (tv64.tv_sec > (time_t) INT32_MAX)) + return (struct timeval32) { INT32_MAX, TV_USEC_MAX}; + return (struct timeval32) { tv64.tv_sec, tv64.tv_usec }; +} + +static inline void +rusage64_to_rusage32 (struct rusage32 *restrict r32, + const struct rusage *restrict r64) +{ + /* Make sure the entire output structure is cleared, including + padding and reserved fields. */ + memset (r32, 0, sizeof *r32); + + r32->ru_utime = valid_timeval64_to_timeval (r64->ru_utime); + r32->ru_stime = valid_timeval64_to_timeval (r64->ru_stime); + r32->ru_maxrss = r64->ru_maxrss; + r32->ru_ixrss = r64->ru_ixrss; + r32->ru_idrss = r64->ru_idrss; + r32->ru_isrss = r64->ru_isrss; + r32->ru_minflt = r64->ru_minflt; + r32->ru_majflt = r64->ru_majflt; + r32->ru_nswap = r64->ru_nswap; + r32->ru_inblock = r64->ru_inblock; + r32->ru_oublock = r64->ru_oublock; + r32->ru_msgsnd = r64->ru_msgsnd; + r32->ru_msgrcv = r64->ru_msgrcv; + r32->ru_nsignals = r64->ru_nsignals; + r32->ru_nvcsw = r64->ru_nvcsw; + r32->ru_nivcsw = r64->ru_nivcsw; +} + +#endif /* tv32-compat.h */ |