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1 | d5975363 | pbrook | /*
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2 | d5975363 | pbrook | * Copyright (c) 2003 Fabrice Bellard
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3 | d5975363 | pbrook | *
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4 | d5975363 | pbrook | * This library is free software; you can redistribute it and/or
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5 | d5975363 | pbrook | * modify it under the terms of the GNU Lesser General Public
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6 | d5975363 | pbrook | * License as published by the Free Software Foundation; either
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7 | d5975363 | pbrook | * version 2 of the License, or (at your option) any later version.
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8 | d5975363 | pbrook | *
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9 | d5975363 | pbrook | * This library is distributed in the hope that it will be useful,
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10 | d5975363 | pbrook | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | d5975363 | pbrook | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 | d5975363 | pbrook | * Lesser General Public License for more details.
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13 | d5975363 | pbrook | *
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14 | d5975363 | pbrook | * You should have received a copy of the GNU Lesser General Public
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15 | 8167ee88 | Blue Swirl | * License along with this library; if not, see <http://www.gnu.org/licenses/>
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16 | d5975363 | pbrook | */
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17 | d5975363 | pbrook | |
18 | 02615337 | Peter Maydell | /* configure guarantees us that we have pthreads on any host except
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19 | 02615337 | Peter Maydell | * mingw32, which doesn't support any of the user-only targets.
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20 | 02615337 | Peter Maydell | * So we can simply assume we have pthread mutexes here.
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21 | 02615337 | Peter Maydell | */
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22 | 02615337 | Peter Maydell | #if defined(CONFIG_USER_ONLY)
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23 | d5975363 | pbrook | |
24 | d5975363 | pbrook | #include <pthread.h> |
25 | d5975363 | pbrook | #define spin_lock pthread_mutex_lock
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26 | d5975363 | pbrook | #define spin_unlock pthread_mutex_unlock
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27 | c227f099 | Anthony Liguori | #define spinlock_t pthread_mutex_t
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28 | d5975363 | pbrook | #define SPIN_LOCK_UNLOCKED PTHREAD_MUTEX_INITIALIZER
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29 | d5975363 | pbrook | |
30 | d5975363 | pbrook | #else
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31 | d5975363 | pbrook | |
32 | 02615337 | Peter Maydell | /* Empty implementations, on the theory that system mode emulation
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33 | 02615337 | Peter Maydell | * is single-threaded. This means that these functions should only
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34 | 02615337 | Peter Maydell | * be used from code run in the TCG cpu thread, and cannot protect
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35 | 02615337 | Peter Maydell | * data structures which might also be accessed from the IO thread
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36 | 02615337 | Peter Maydell | * or from signal handlers.
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37 | 02615337 | Peter Maydell | */
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38 | c227f099 | Anthony Liguori | typedef int spinlock_t; |
39 | d5975363 | pbrook | #define SPIN_LOCK_UNLOCKED 0 |
40 | d5975363 | pbrook | |
41 | c227f099 | Anthony Liguori | static inline void spin_lock(spinlock_t *lock) |
42 | d5975363 | pbrook | { |
43 | d5975363 | pbrook | } |
44 | d5975363 | pbrook | |
45 | c227f099 | Anthony Liguori | static inline void spin_unlock(spinlock_t *lock) |
46 | d5975363 | pbrook | { |
47 | d5975363 | pbrook | } |
48 | d5975363 | pbrook | |
49 | d5975363 | pbrook | #endif |