| 1 | /* |
| 2 | * QEMU user-only mmap lock, with stubs for system mode |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * SPDX-License-Identifier: LGPL-2.1-or-later |
| 7 | */ |
| 8 | #ifndef EXEC_MMAP_LOCK_H |
| 9 | #define EXEC_MMAP_LOCK_H |
| 10 | |
| 11 | #ifdef CONFIG_USER_ONLY |
| 12 | |
| 13 | void TSA_NO_TSA mmap_lock(void); |
| 14 | void TSA_NO_TSA mmap_unlock(void); |
| 15 | bool have_mmap_lock(void); |
| 16 | |
| 17 | static inline void mmap_unlock_guard(void *unused) |
| 18 | { |
| 19 | mmap_unlock(); |
| 20 | } |
| 21 | |
| 22 | #define WITH_MMAP_LOCK_GUARD() \ |
| 23 | for (int _mmap_lock_iter __attribute__((cleanup(mmap_unlock_guard))) \ |
| 24 | = (mmap_lock(), 0); _mmap_lock_iter == 0; _mmap_lock_iter = 1) |
| 25 | |
| 26 | #else |
| 27 | |
| 28 | static inline void mmap_lock(void) {} |
| 29 | static inline void mmap_unlock(void) {} |
| 30 | #define WITH_MMAP_LOCK_GUARD() |
| 31 | |
| 32 | #endif /* CONFIG_USER_ONLY */ |
| 33 | #endif /* EXEC_MMAP_LOCK_H */ |