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authorru <ru@FreeBSD.org>2001-10-26 17:38:20 +0000
committerru <ru@FreeBSD.org>2001-10-26 17:38:20 +0000
commit5cf7b5f41f4236d42751f1ffbb7c54d5160772ca (patch)
tree8aa1b798dafa0810da76835d9fb76f6cf3efa499 /lib/libc/sys/read.2
parentefc392e6af8312d69312f3d4ff5bc8e558301448 (diff)
downloadFreeBSD-src-5cf7b5f41f4236d42751f1ffbb7c54d5160772ca.zip
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Remove the internal implementation details of wrapping syscalls,
which do not match the reality anyway. Approved by: deischen, bde
Diffstat (limited to 'lib/libc/sys/read.2')
-rw-r--r--lib/libc/sys/read.248
1 files changed, 0 insertions, 48 deletions
diff --git a/lib/libc/sys/read.2 b/lib/libc/sys/read.2
index e4f330a..42d04ce 100644
--- a/lib/libc/sys/read.2
+++ b/lib/libc/sys/read.2
@@ -116,54 +116,6 @@ return the number of bytes actually read and placed in the buffer.
The system guarantees to read the number of bytes requested if
the descriptor references a normal file that has that many bytes left
before the end-of-file, but in no other case.
-.Sh IMPLEMENTATION NOTES
-In the non-threaded library
-.Fn read
-is implemented as the
-.Va read
-syscall.
-.Pp
-In the threaded library, the
-.Va read
-syscall is assembled to
-.Fn _thread_sys_read
-and
-.Fn read
-is implemented as a function which locks
-.Fa d
-for read, then calls
-.Fn _thread_sys_read .
-If the call to
-.Fn _thread_sys_read
-would block, a context switch is performed.
-Before returning,
-.Fn read
-unlocks
-.Fa d .
-.Pp
-In the non-threaded library
-.Fn readv
-is implemented as the
-.Va readv
-syscall.
-.Pp
-In the threaded library, the
-.Va readv
-syscall is assembled to
-.Fn _thread_sys_readv
-and
-.Fn readv
-is implemented as a function which locks
-.Fa d
-for read, then calls
-.Fn _thread_sys_readv .
-If the call to
-.Fn _thread_sys_readv
-would block, a context switch is performed.
-Before returning,
-.Fn readv
-unlocks
-.Fa d .
.Sh RETURN VALUES
If successful, the
number of bytes actually read is returned.
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