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#ifdef ATOMIC_ALL_NIGHTERS
/* function annotations */
#define MAY_SLEEP __attribute__((atomic_all_nighters("might_sleep")))
/* context-changing annotations */
#define ENTER_ATOMIC __attribute__((atomic_all_nighters("wont_sleep","force_disable")))
#define EXIT_ATOMIC __attribute__((atomic_all_nighters("wont_sleep","force_enable")))
#define ENTER_ATOMIC_NESTED __attribute__((atomic_all_nighters("wont_sleep","enter_nested")))
#define EXIT_ATOMIC_NESTED __attribute__((atomic_all_nighters("wont_sleep","exit_nested")))
#else
#define MAY_SLEEP
#define ENTER_ATOMIC
#define EXIT_ATOMIC
#define ENTER_ATOMIC_NESTED
#define EXIT_ATOMIC_NESTED
#endif
struct mutex;
struct spinlock;
void mutex_lock(struct mutex *mp) MAY_SLEEP;
void mutex_unlock(struct mutex *mp) MAY_SLEEP;
void spin_lock(struct spinlock *sp) ENTER_ATOMIC_NESTED;
void spin_unlock(struct spinlock *sp) EXIT_ATOMIC_NESTED;
struct spinlock *a;
struct spinlock *b;
struct mutex *m;
int x;
int y;
int z;
void f(struct spinlock *sp);
void g(struct spinlock *sp);
int MAY_SLEEP main() {
f(a);
x++;
f(b);
y++;
g(*(&a));
mutex_lock(m);
g(b);
z++;
mutex_unlock(m);
// return 0;
}
void ENTER_ATOMIC_NESTED f(struct spinlock *sp) {
spin_lock(sp);
}
void EXIT_ATOMIC_NESTED g(struct spinlock *sp) {
spin_unlock(sp);
}
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