/* Machine-dependent pthreads configuration and inline functions. Xtensa version. Copyright (C) 2007 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef _PT_MACHINE_H #define _PT_MACHINE_H 1 #include <sys/syscall.h> #include <asm/unistd.h> #ifndef PT_EI # define PT_EI __extern_always_inline #endif /* Memory barrier. */ #define MEMORY_BARRIER() __asm__ ("memw" : : : "memory") /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { int unused = 0; return INTERNAL_SYSCALL (xtensa, , 4, SYS_XTENSA_ATOMIC_SET, spinlock, 1, unused); } /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ #define CURRENT_STACK_FRAME __builtin_frame_address (0) #endif /* _PT_MACHINE_H */