Move some stuff out of alMain.h

3 files changed, 235 insertions, 0 deletions

diff --git a/Alc/atomic.h b/Alc/atomic.h
new file mode 100644
index 00000000..9c249808
--- /dev/null
+++ b/Alc/atomic.h
@@ -0,0 +1,180 @@
+#ifndef AL_ATOMIC_H
+#define AL_ATOMIC_H
+
+
+typedef void *volatile XchgPtr;
+
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) && !defined(__QNXNTO__)
+typedef unsigned int RefCount;
+static inline RefCount IncrementRef(volatile RefCount *ptr)
+{ return __sync_add_and_fetch(ptr, 1); }
+static inline RefCount DecrementRef(volatile RefCount *ptr)
+{ return __sync_sub_and_fetch(ptr, 1); }
+
+static inline int ExchangeInt(volatile int *ptr, int newval)
+{
+    return __sync_lock_test_and_set(ptr, newval);
+}
+static inline void *ExchangePtr(XchgPtr *ptr, void *newval)
+{
+    return __sync_lock_test_and_set(ptr, newval);
+}
+static inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
+{
+    return __sync_bool_compare_and_swap(ptr, oldval, newval);
+}
+static inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
+{
+    return __sync_bool_compare_and_swap(ptr, oldval, newval);
+}
+
+#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+
+static inline unsigned int xaddl(volatile unsigned int *dest, int incr)
+{
+    unsigned int ret;
+    __asm__ __volatile__("lock; xaddl %0,(%1)"
+                         : "=r" (ret)
+                         : "r" (dest), "0" (incr)
+                         : "memory");
+    return ret;
+}
+
+typedef unsigned int RefCount;
+static inline RefCount IncrementRef(volatile RefCount *ptr)
+{ return xaddl(ptr, 1)+1; }
+static inline RefCount DecrementRef(volatile RefCount *ptr)
+{ return xaddl(ptr, -1)-1; }
+
+static inline int ExchangeInt(volatile int *dest, int newval)
+{
+    int ret;
+    __asm__ __volatile__("lock; xchgl %0,(%1)"
+                         : "=r" (ret)
+                         : "r" (dest), "0" (newval)
+                         : "memory");
+    return ret;
+}
+
+static inline ALboolean CompExchangeInt(volatile int *dest, int oldval, int newval)
+{
+    int ret;
+    __asm__ __volatile__("lock; cmpxchgl %2,(%1)"
+                         : "=a" (ret)
+                         : "r" (dest), "r" (newval), "0" (oldval)
+                         : "memory");
+    return ret == oldval;
+}
+
+static inline void *ExchangePtr(XchgPtr *dest, void *newval)
+{
+    void *ret;
+    __asm__ __volatile__(
+#ifdef __i386__
+                         "lock; xchgl %0,(%1)"
+#else
+                         "lock; xchgq %0,(%1)"
+#endif
+                         : "=r" (ret)
+                         : "r" (dest), "0" (newval)
+                         : "memory"
+    );
+    return ret;
+}
+
+static inline ALboolean CompExchangePtr(XchgPtr *dest, void *oldval, void *newval)
+{
+    void *ret;
+    __asm__ __volatile__(
+#ifdef __i386__
+                         "lock; cmpxchgl %2,(%1)"
+#else
+                         "lock; cmpxchgq %2,(%1)"
+#endif
+                         : "=a" (ret)
+                         : "r" (dest), "r" (newval), "0" (oldval)
+                         : "memory"
+    );
+    return ret == oldval;
+}
+
+#elif defined(_WIN32)
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef LONG RefCount;
+static inline RefCount IncrementRef(volatile RefCount *ptr)
+{ return InterlockedIncrement(ptr); }
+static inline RefCount DecrementRef(volatile RefCount *ptr)
+{ return InterlockedDecrement(ptr); }
+
+extern ALbyte LONG_size_does_not_match_int[(sizeof(LONG)==sizeof(int))?1:-1];
+
+static inline int ExchangeInt(volatile int *ptr, int newval)
+{
+    union {
+        volatile int *i;
+        volatile LONG *l;
+    } u = { ptr };
+    return InterlockedExchange(u.l, newval);
+}
+static inline void *ExchangePtr(XchgPtr *ptr, void *newval)
+{
+    return InterlockedExchangePointer(ptr, newval);
+}
+static inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
+{
+    union {
+        volatile int *i;
+        volatile LONG *l;
+    } u = { ptr };
+    return InterlockedCompareExchange(u.l, newval, oldval) == oldval;
+}
+static inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
+{
+    return InterlockedCompareExchangePointer(ptr, newval, oldval) == oldval;
+}
+
+#elif defined(__APPLE__)
+
+#include <libkern/OSAtomic.h>
+
+typedef int32_t RefCount;
+static inline RefCount IncrementRef(volatile RefCount *ptr)
+{ return OSAtomicIncrement32Barrier(ptr); }
+static inline RefCount DecrementRef(volatile RefCount *ptr)
+{ return OSAtomicDecrement32Barrier(ptr); }
+
+static inline int ExchangeInt(volatile int *ptr, int newval)
+{
+    /* Really? No regular old atomic swap? */
+    int oldval;
+    do {
+        oldval = *ptr;
+    } while(!OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr));
+    return oldval;
+}
+static inline void *ExchangePtr(XchgPtr *ptr, void *newval)
+{
+    void *oldval;
+    do {
+        oldval = *ptr;
+    } while(!OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr));
+    return oldval;
+}
+static inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
+{
+    return OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr);
+}
+static inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
+{
+    return OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr);
+}
+
+#else
+#error "No atomic functions available on this platform!"
+typedef ALuint RefCount;
+#endif
+
+#endif /* AL_ATOMIC_H */
diff --git a/Alc/rwlock.h b/Alc/rwlock.h
new file mode 100644
index 00000000..efbab4e8
--- /dev/null
+++ b/Alc/rwlock.h
@@ -0,0 +1,21 @@
+#ifndef AL_RWLOCK_H
+#define AL_RWLOCK_H
+
+#include "AL/al.h"
+#include "atomic.h"
+
+typedef struct {
+    volatile RefCount read_count;
+    volatile RefCount write_count;
+    volatile ALenum read_lock;
+    volatile ALenum read_entry_lock;
+    volatile ALenum write_lock;
+} RWLock;
+
+void RWLockInit(RWLock *lock);
+void ReadLock(RWLock *lock);
+void ReadUnlock(RWLock *lock);
+void WriteLock(RWLock *lock);
+void WriteUnlock(RWLock *lock);
+
+#endif /* AL_RWLOCK_H */
diff --git a/Alc/uintmap.h b/Alc/uintmap.h
new file mode 100644
index 00000000..d692e878
--- /dev/null
+++ b/Alc/uintmap.h
@@ -0,0 +1,34 @@
+#ifndef AL_UINTMAP_H
+#define AL_UINTMAP_H
+
+#include "AL/al.h"
+#include "rwlock.h"
+
+typedef struct UIntMap {
+    struct {
+        ALuint key;
+        ALvoid *value;
+    } *array;
+    ALsizei size;
+    ALsizei maxsize;
+    ALsizei limit;
+    RWLock lock;
+} UIntMap;
+extern UIntMap TlsDestructor;
+
+void InitUIntMap(UIntMap *map, ALsizei limit);
+void ResetUIntMap(UIntMap *map);
+ALenum InsertUIntMapEntry(UIntMap *map, ALuint key, ALvoid *value);
+ALvoid *RemoveUIntMapKey(UIntMap *map, ALuint key);
+ALvoid *LookupUIntMapKey(UIntMap *map, ALuint key);
+
+static inline void LockUIntMapRead(UIntMap *map)
+{ ReadLock(&map->lock); }
+static inline void UnlockUIntMapRead(UIntMap *map)
+{ ReadUnlock(&map->lock); }
+static inline void LockUIntMapWrite(UIntMap *map)
+{ WriteLock(&map->lock); }
+static inline void UnlockUIntMapWrite(UIntMap *map)
+{ WriteUnlock(&map->lock); }
+
+#endif /* AL_UINTMAP_H */