sysv/linux: Rename alpha functions to be alpha specific

These functions are alpha specifc, rename them to be clear.

Let's also rename the header file from tv32-compat.h to
alpha-tv32-compat.h. This is to avoid conflicts with the one we will
introduce later.

Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/alpha-tv32-compat.h b/sysdeps/unix/sysv/linux/alpha/alpha-tv32-compat.h
new file mode 100644
index 0000000000..3f80946a02
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/alpha-tv32-compat.h
@@ -0,0 +1,124 @@
+/* Compatibility definitions for `struct timeval' with 32-bit time_t.
+   Copyright (C) 2019-2020 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
+alpha_valid_timeval32_to_timeval (const struct timeval32 tv)
+{
+  return (struct timeval) { tv.tv_sec, tv.tv_usec };
+}
+
+static inline struct timeval32
+alpha_valid_timeval_to_timeval32 (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 struct timespec
+alpha_valid_timeval32_to_timespec (const struct timeval32 tv)
+{
+  return (struct timespec) { tv.tv_sec, tv.tv_usec * 1000 };
+}
+
+static inline struct timeval32
+alpha_valid_timespec_to_timeval32 (const struct timespec ts)
+{
+  return (struct timeval32) { (time_t) ts.tv_sec, ts.tv_nsec / 1000 };
+}
+
+static inline void
+alpha_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    = alpha_valid_timeval_to_timeval32 (r64->ru_utime);
+  r32->ru_stime    = alpha_valid_timeval_to_timeval32 (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 /* alpha-tv32-compat.h  */