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Try fixing a warning when compiling with GCC as C++.

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This commit is contained in:
David Reid
2020-11-28 11:03:08 +10:00
parent d4add63b43
commit e10c34bc62
1 changed files with 6 additions and 6 deletions
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research/miniaudio_engine.h
+6 -6
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@@ -1035,9 +1035,9 @@ The slot index is stored in the low 32 bits. The reference counter is stored in
*/
typedef struct
{
volatile struct
struct
{
ma_uint32 bitfield;
volatile ma_uint32 bitfield; /* Marking as volatile because the allocation and freeing routines need to make copies of this which must never be optimized away by the compiler. */
} groups[MA_RESOURCE_MANAGER_JOB_QUEUE_CAPACITY/32];
ma_uint32 slots[MA_RESOURCE_MANAGER_JOB_QUEUE_CAPACITY]; /* 32 bits for reference counting for ABA mitigation. */
ma_uint32 count; /* Allocation count. */
@@ -3828,11 +3828,11 @@ MA_API ma_result ma_slot_allocator_alloc(ma_slot_allocator* pAllocator, ma_uint6
for (iGroup = 0; iGroup < ma_countof(pAllocator->groups); iGroup += 1) {
/* CAS */
for (;;) {
volatile ma_uint32 oldBitfield; /* Making this volatile because we want to make sure the compiler does not optimize away the oldBitfield assignment. */
ma_uint32 newBitfield;
ma_uint32 oldBitfield;
ma_uint32 bitOffset;
oldBitfield = pAllocator->groups[iGroup].bitfield;
oldBitfield = pAllocator->groups[iGroup].bitfield; /* <-- This copy must happen. The compiler must not optimize this away. */
/* Fast check to see if anything is available. */
if (oldBitfield == 0xFFFFFFFF) {
@@ -3896,10 +3896,10 @@ MA_API ma_result ma_slot_allocator_free(ma_slot_allocator* pAllocator, ma_uint64
while (pAllocator->count > 0) {
/* CAS */
volatile ma_uint32 oldBitfield; /* Making this volatile because we want to make sure the compiler does not optimize away the oldBitfield assignment. */
ma_uint32 newBitfield;
ma_uint32 oldBitfield;
oldBitfield = pAllocator->groups[iGroup].bitfield;
oldBitfield = pAllocator->groups[iGroup].bitfield; /* <-- This copy must happen. The compiler must not optimize this away. */
newBitfield = oldBitfield & ~(1 << iBit);
if (c89atomic_compare_and_swap_32(&pAllocator->groups[iGroup].bitfield, oldBitfield, newBitfield) == oldBitfield) {