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From 25fae380b721fdb3fe27872dda57d4534d7d78c1 Mon Sep 17 00:00:00 2001
From: "Peter S. Mazinger" <ps.m@gmx.net>
Date: Fri, 22 Apr 2011 01:25:31 +0200
Subject: [PATCH 4/6] add cancellation to generic pread_write
Prepare the file to be used in all arch specific files
Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
(cherry picked from commit 61198b43ee8a639544622d0e666b972418c9c383)
---
libc/sysdeps/linux/common/pread_write.c | 100 ++++++++++++++++----------------
1 file changed, 51 insertions(+), 49 deletions(-)
diff --git a/libc/sysdeps/linux/common/pread_write.c b/libc/sysdeps/linux/common/pread_write.c
index 48fe7dd..3d04bb7 100644
--- a/libc/sysdeps/linux/common/pread_write.c
+++ b/libc/sysdeps/linux/common/pread_write.c
@@ -15,71 +15,73 @@
#include <sys/syscall.h>
#include <unistd.h>
-#include <stdint.h>
#include <endian.h>
+#include <bits/wordsize.h>
+#include <cancel.h>
-extern __typeof(pread) __libc_pread;
-extern __typeof(pwrite) __libc_pwrite;
-#ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-extern __typeof(pwrite64) __libc_pwrite64;
-#endif
-
-#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
+#ifdef __NR_pread64
# undef __NR_pread
# define __NR_pread __NR_pread64
#endif
+#ifdef __NR_pwrite64
+# undef __NR_pwrite
+# define __NR_pwrite __NR_pwrite64
+#endif
-#include <bits/kernel_types.h>
-
-#ifdef __NR_pread
+#ifndef MY_PREAD
+# ifdef __NR_pread
+# define __NR___syscall_pread __NR_pread
+static _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
+ size_t, count, off_t, offset_hi, off_t, offset_lo)
+# define MY_PREAD(fd, buf, count, offset) __syscall_pread(fd, buf, count, OFF_HI_LO(offset))
+# define MY_PREAD64(fd, buf, count, offset) __syscall_pread(fd, buf, count, OFF64_HI_LO(offset))
+#endif
-# define __NR___syscall_pread __NR_pread
-static __inline__ _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
- size_t, count, off_t, offset_hi, off_t, offset_lo)
+#ifndef MY_PWRITE
+# ifdef __NR_pwrite
+# define __NR___syscall_pwrite __NR_pwrite
+static _syscall5(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
+ size_t, count, off_t, offset_hi, off_t, offset_lo)
+# define MY_PWRITE(fd, buf, count, offset) __syscall_pwrite(fd, buf, count, OFF_HI_LO(offset))
+# define MY_PWRITE64(fd, buf, count, offset) __syscall_pwrite(fd, buf, count, OFF64_HI_LO(offset))
+#endif
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
+static ssize_t __NC(pread)(int fd, void *buf, size_t count, off_t offset)
{
- return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset));
+ return MY_PREAD(fd, buf, count, offset);
}
-weak_alias(__libc_pread,pread)
+CANCELLABLE_SYSCALL(ssize_t, pread, (int fd, void *buf, size_t count, off_t offset),
+ (fd, buf, count, offset))
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
+static ssize_t __NC(pwrite)(int fd, const void *buf, size_t count, off_t offset)
{
- uint32_t low = offset & 0xffffffff;
- uint32_t high = offset >> 32;
- return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(high, low));
+ return MY_PWRITE(fd, buf, count, offset);
}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__ */
+CANCELLABLE_SYSCALL(ssize_t, pwrite, (int fd, const void *buf, size_t count, off_t offset),
+ (fd, buf, count, offset))
-#endif /* __NR_pread */
-
-#ifdef __NR_pwrite64 /* Newer kernels renamed but it's the same. */
-# undef __NR_pwrite
-# define __NR_pwrite __NR_pwrite64
-#endif
-
-#ifdef __NR_pwrite
-
-# define __NR___syscall_pwrite __NR_pwrite
-static __inline__ _syscall5(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
- size_t, count, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
+#ifdef __UCLIBC_HAS_LFS__
+# if __WORDSIZE == 32
+static ssize_t __NC(pread64)(int fd, void *buf, size_t count, off64_t offset)
{
- return __syscall_pwrite(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset));
+ return MY_PREAD64(fd, buf, count, offset);
}
-weak_alias(__libc_pwrite,pwrite)
+CANCELLABLE_SYSCALL(ssize_t, pread64, (int fd, void *buf, size_t count, off64_t offset),
+ (fd, buf, count, offset))
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
+static ssize_t __NC(pwrite64)(int fd, const void *buf, size_t count, off64_t offset)
{
- uint32_t low = offset & 0xffffffff;
- uint32_t high = offset >> 32;
- return __syscall_pwrite(fd, buf, count, __LONG_LONG_PAIR(high, low));
+ return MY_PWRITE64(fd, buf, count, offset);
}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__ */
-#endif /* __NR_pwrite */
+CANCELLABLE_SYSCALL(ssize_t, pwrite64, (int fd, const void *buf, size_t count, off64_t offset),
+ (fd, buf, count, offset))
+# else
+# ifdef __LINUXTHREADS_OLD__
+weak_alias(pread,pread64)
+weak_alias(pwrite,pwrite64)
+# else
+strong_alias_untyped(pread,pread64)
+strong_alias_untyped(pwrite,pwrite64)
+# endif
+# endif
+#endif
--
1.7.11.1
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