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Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/pthread/tls.h')
-rw-r--r-- | libpthread/linuxthreads.old/sysdeps/pthread/tls.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/pthread/tls.h b/libpthread/linuxthreads.old/sysdeps/pthread/tls.h new file mode 100644 index 000000000..6a23ec05e --- /dev/null +++ b/libpthread/linuxthreads.old/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). + */ |