Add a generic vector interface and use it for the active effect slots

Alc/ALc.c

@@ -2173,10 +2173,7 @@ static ALCvoid FreeContext(ALCcontext *context)
     context->ActiveSourceCount = 0;
     context->MaxActiveSources = 0;
 
-    context->ActiveEffectSlotCount = 0;
-    free(context->ActiveEffectSlots);
-    context->ActiveEffectSlots = NULL;
-    context->MaxActiveEffectSlots = 0;
+    VECTOR_DEINIT(context->ActiveAuxSlots);
 
     ALCdevice_DecRef(context->Device);
     context->Device = NULL;
@@ -2891,11 +2888,13 @@ ALC_API ALCcontext* ALC_APIENTRY alcCreateContext(ALCdevice *device, const ALCin
         ALContext->ref = 1;
         ALContext->Listener = (ALlistener*)ALContext->_listener_mem;
 
+        VECTOR_INIT(ALContext->ActiveAuxSlots);
+
         ALContext->MaxActiveSources = 256;
         ALContext->ActiveSources = calloc(ALContext->MaxActiveSources,
                                           sizeof(ALContext->ActiveSources[0]));
     }
-    if(!ALContext || !ALContext->ActiveSources)
+    if(!ALContext || !ALContext->ActiveAuxSlots || !ALContext->ActiveSources)
     {
         if(!device->ContextList)
         {
@@ -2904,8 +2903,16 @@ ALC_API ALCcontext* ALC_APIENTRY alcCreateContext(ALCdevice *device, const ALCin
         }
         UnlockLists();
 
-        free(ALContext);
-        ALContext = NULL;
+        if(ALContext)
+        {
+            free(ALContext->ActiveSources);
+            ALContext->ActiveSources = NULL;
+
+            VECTOR_DEINIT(ALContext->ActiveAuxSlots);
+
+            free(ALContext);
+            ALContext = NULL;
+        }
 
         alcSetError(device, ALC_OUT_OF_MEMORY);
         ALCdevice_DecRef(device);

Alc/ALu.c

@@ -1086,8 +1086,8 @@ ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size)
             }
 
             /* effect slot processing */
-            slot = ctx->ActiveEffectSlots;
-            slot_end = slot + ctx->ActiveEffectSlotCount;
+            slot = VECTOR_ITER_BEGIN(ctx->ActiveAuxSlots);
+            slot_end = VECTOR_ITER_END(ctx->ActiveAuxSlots);
             while(slot != slot_end)
             {
                 ALfloat offset = (*slot)->ClickRemoval[0];

Alc/helpers.c

@@ -86,6 +86,7 @@ DEFINE_DEVPROPKEY(DEVPKEY_Device_FriendlyName, 0xa45c254e, 0xdf1c, 0x4efd, 0x80,
 #include "alMain.h"
 #include "atomic.h"
 #include "uintmap.h"
+#include "vector.h"
 #include "compat.h"
 
 
@@ -700,6 +701,26 @@ void WriteUnlock(RWLock *lock)
 }
 
 
+ALboolean vector_reserve(void *ptr, size_t orig_count, size_t base_size, size_t obj_count, size_t obj_size)
+{
+    if(orig_count < obj_count)
+    {
+        vector_ *vecptr = ptr;
+        void *temp;
+
+        /* Need to be explicit with the caller type's base size, because it
+         * could have extra padding between the count and array start (that is,
+         * sizeof(*vector_) may not equal base_size). */
+        temp = realloc(*vecptr, base_size + obj_size*obj_count);
+        if(temp == NULL) return AL_FALSE;
+
+        *vecptr = temp;
+        (*vecptr)->Max = obj_count;
+    }
+    return AL_TRUE;
+}
+
+
 void InitUIntMap(UIntMap *map, ALsizei limit)
 {
     map->array = NULL;

Alc/vector.h

@@ -0,0 +1,38 @@
+#ifndef AL_VECTOR_H
+#define AL_VECTOR_H
+
+#include <stdlib.h>
+
+#include <AL/al.h>
+
+/* "Base" vector type, designed to alias with the actual vector types. */
+typedef struct vector__s {
+    ALsizei Max;
+    ALsizei Size;
+} *vector_;
+
+#define DECL_VECTOR(T) typedef struct vector_##T##_s {                        \
+    ALsizei Max;                                                              \
+    ALsizei Size;                                                             \
+    T Data[];                                                                 \
+} *vector_##T;
+
+#define VECTOR_INIT(_x)   (((_x) = calloc(1, sizeof(*(_x)))) != NULL)
+#define VECTOR_DEINIT(_x) do { free(_x); _x = NULL; } while(0)
+
+/* Helper to increase a vector's reserve. Do not call directly. */
+ALboolean vector_reserve(void *ptr, size_t orig_count, size_t base_size, size_t obj_count, size_t obj_size);
+#define VECTOR_RESERVE(_x, _c) (vector_reserve(&(_x), (_x)->Max, sizeof(*(_x)), (_c), sizeof((_x)->Data[0])))
+
+#define VECTOR_SIZE(_x) ((const ALsizei)(_x)->Size)
+
+#define VECTOR_ITER_BEGIN(_x) ((_x)->Data)
+#define VECTOR_ITER_END(_x)   ((_x)->Data + (_x)->Size)
+
+/* NOTE: The caller must ensure enough space is reserved before pushing in new objects. */
+#define VECTOR_PUSH_BACK(_x, _obj) ((void)((_x)->Data[(_x)->Size++] = (_obj)))
+#define VECTOR_POP_BACK(_x) ((void)((_x)->Size--))
+
+#define VECTOR_ELEM(_x, _o) ((_x)->Data[_o])
+
+#endif /* AL_VECTOR_H */

OpenAL32/Include/alMain.h

@@ -22,6 +22,7 @@
 
 #include "atomic.h"
 #include "uintmap.h"
+#include "vector.h"
 
 #ifndef ALC_SOFT_HRTF
 #define ALC_SOFT_HRTF 1
@@ -722,6 +723,10 @@ struct ALCdevice_struct
 #define MIXER_THREAD_NAME "alsoft-mixer"
 
 
+typedef struct ALeffectslot *ALeffectslotPtr;
+DECL_VECTOR(ALeffectslotPtr)
+
+
 struct ALCcontext_struct
 {
     volatile RefCount ref;
@@ -747,9 +752,7 @@ struct ALCcontext_struct
     ALsizei ActiveSourceCount;
     ALsizei MaxActiveSources;
 
-    struct ALeffectslot **ActiveEffectSlots;
-    ALsizei               ActiveEffectSlotCount;
-    ALsizei               MaxActiveEffectSlots;
+    vector_ALeffectslotPtr ActiveAuxSlots;
 
     ALCdevice  *Device;
     const ALCchar *ExtensionList;

OpenAL32/alAuxEffectSlot.c

@@ -380,14 +380,14 @@ static ALvoid RemoveEffectSlotArray(ALCcontext *context, ALeffectslot *slot)
     ALeffectslot **slotlist, **slotlistend;
 
     LockContext(context);
-    slotlist = context->ActiveEffectSlots;
-    slotlistend = slotlist + context->ActiveEffectSlotCount;
+    slotlist = VECTOR_ITER_BEGIN(context->ActiveAuxSlots);
+    slotlistend = VECTOR_ITER_END(context->ActiveAuxSlots);
     while(slotlist != slotlistend)
     {
         if(*slotlist == slot)
         {
             *slotlist = *(--slotlistend);
-            context->ActiveEffectSlotCount--;
+            VECTOR_POP_BACK(context->ActiveAuxSlots);
             break;
         }
         slotlist++;
@@ -397,33 +397,23 @@ static ALvoid RemoveEffectSlotArray(ALCcontext *context, ALeffectslot *slot)
 
 static ALenum AddEffectSlotArray(ALCcontext *context, ALsizei count, const ALuint *slots)
 {
-    ALsizei i;
+    ALsizei total = count + VECTOR_SIZE(context->ActiveAuxSlots);
 
     LockContext(context);
-    if(count > context->MaxActiveEffectSlots-context->ActiveEffectSlotCount)
+    if(total < VECTOR_SIZE(context->ActiveAuxSlots) || VECTOR_RESERVE(context->ActiveAuxSlots, total) == AL_FALSE)
     {
-        ALsizei newcount;
-        void *temp = NULL;
-
-        newcount = context->MaxActiveEffectSlots ? (context->MaxActiveEffectSlots<<1) : 1;
-        if(newcount > context->MaxActiveEffectSlots)
-            temp = realloc(context->ActiveEffectSlots,
-                           newcount * sizeof(*context->ActiveEffectSlots));
-        if(!temp)
-        {
-            UnlockContext(context);
-            return AL_OUT_OF_MEMORY;
-        }
-        context->ActiveEffectSlots = temp;
-        context->MaxActiveEffectSlots = newcount;
+        UnlockContext(context);
+        return AL_OUT_OF_MEMORY;
     }
-    for(i = 0;i < count;i++)
+
+    while(VECTOR_SIZE(context->ActiveAuxSlots) < total)
     {
-        ALeffectslot *slot = LookupEffectSlot(context, slots[i]);
+        ALeffectslot *slot = LookupEffectSlot(context, *(slots++));
         assert(slot != NULL);
-        context->ActiveEffectSlots[context->ActiveEffectSlotCount++] = slot;
+        VECTOR_PUSH_BACK(context->ActiveAuxSlots, slot);
     }
     UnlockContext(context);
+
     return AL_NO_ERROR;
 }
 

OpenAL32/alState.c

@@ -748,8 +748,8 @@ AL_API ALvoid AL_APIENTRY alDeferUpdatesSOFT(void)
             src++;
         }
 
-        slot = context->ActiveEffectSlots;
-        slot_end = slot + context->ActiveEffectSlotCount;
+        slot = VECTOR_ITER_BEGIN(context->ActiveAuxSlots);
+        slot_end = VECTOR_ITER_END(context->ActiveAuxSlots);
         while(slot != slot_end)
         {
             if(ExchangeInt(&(*slot)->NeedsUpdate, AL_FALSE))