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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /* Machine-dependent pthreads configuration and inline functions. Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ralf Baechle <ralf@gnu.org>. Based on the Alpha version by Richard Henderson <rth@tamu.edu>. 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; see the file COPYING.LIB. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _PT_MACHINE_H #define _PT_MACHINE_H 1 #include <features.h> #ifndef PT_EI # define PT_EI __extern_always_inline #endif /* Copyright (C) 2000, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000. */ static __inline__ int __NTH (_test_and_set (int *p, int v)) { int r, t; __asm__ __volatile__ ("/* Inline test and set */\n" "1:\n\t" ".set push\n\t" ".set mips2\n\t" "ll %0,%3\n\t" "move %1,%4\n\t" "beq %0,%4,2f\n\t" "sc %1,%2\n\t" ".set pop\n\t" "beqz %1,1b\n" "2:\n\t" "/* End test and set */" : "=&r" (r), "=&r" (t), "=m" (*p) : "m" (*p), "r" (v) : "memory"); return r; } /* Spinlock implementation; required. */ PT_EI long int testandset (int *spinlock) { return _test_and_set (spinlock, 1); } /* 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 stack_pointer register char * stack_pointer __asm__ ("$29"); /* Compare-and-swap for semaphores. */ #define HAS_COMPARE_AND_SWAP PT_EI int __compare_and_swap (long int *p, long int oldval, long int newval) { long int ret, temp; __asm__ __volatile__ ("/* Inline compare & swap */\n" "1:\n\t" ".set push\n\t" ".set mips2\n\t" "ll %1,%5\n\t" "move %0,$0\n\t" "bne %1,%3,2f\n\t" "move %0,%4\n\t" "sc %0,%2\n\t" ".set pop\n\t" "beqz %0,1b\n" "2:\n\t" "/* End compare & swap */" : "=&r" (ret), "=&r" (temp), "=m" (*p) : "r" (oldval), "r" (newval), "m" (*p) : "memory"); return ret; } #endif /* pt-machine.h */ |