Major update for pthreads, based in large part on improvements

from glibc 2.3.  This should make threads much more efficient.
 -Erik

1 files changed, 81 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/pthread/tls.h b/libpthread/linuxthreads/sysdeps/pthread/tls.h
new file mode 100644
index 000000000..6a23ec05e
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/pthread/tls.h
@@ -0,0 +1,81 @@
+/* Definition for thread-local data handling.  Generic version.
+   Copyright (C) 2002 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* By default no TLS support is available.  This is signaled by the
+   absence of the symbol USE_TLS.  */
+#undef USE_TLS
+
+
+/* An architecture-specific version of this file has to defined a
+   number of symbols:
+
+     TLS_TCB_AT_TP  or  TLS_DTV_AT_TP
+
+     The presence of one of these symbols signals which variant of
+     the TLS ABI is used.  There are in the moment two variants
+     available:
+
+     * the thread pointer points to a thread control block
+
+     * the thread pointer points to the dynamic thread vector
+
+
+     TLS_TCB_SIZE
+
+     This is the size of the thread control block structure.  How
+     this is actually defined depends on the ABI.  The thread control
+     block could be internal descriptor of the thread library or
+     just a data structure which allows finding the DTV.
+
+     TLS_INIT_TCB_SIZE
+
+     Similarly, but this value is only used at startup and in the
+     dynamic linker itself.  There are no threads in use at that time.
+
+
+     TLS_TCB_ALIGN
+
+     Alignment requirements for the TCB structure.
+
+     TLS_INIT_TCB_ALIGN
+
+     Similarly, but for the structure used at startup time.
+
+
+     INSTALL_DTV(tcb, init_dtv)
+
+     This macro must install the given initial DTV into the thread control
+     block TCB.  The normal runtime functionality must then be able to
+     use the value.
+
+
+     TLS_INIT_TP(tcb, firstcall)
+
+     This macro must initialize the thread pointer to enable normal TLS
+     operation.  The first parameter is a pointer to the thread control
+     block.  The second parameter specifies whether this is the first
+     call for the TCB.  ld.so calls this macro more than once.
+
+
+     THREAD_DTV()
+
+     This macro returns the address of the DTV of the current thread.
+     This normally is done using the the thread register which points
+     to the dtv or the TCB (from which the DTV can found).
+  */