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Modernize atomics

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- Based on C++11's `atomic`
- Reworked `SafeRefCount` (based on the rewrite by @hpvb)
- Replaced free atomic functions by the new `SafeNumeric<T>`
- Replaced wrong cases of `volatile bool` by the new `SafeFlag`
- Platform-specific implementations no longer needed

Co-authored-by: Hein-Pieter van Braam-Stewart <hp@tmm.cx>
This commit is contained in:
Pedro J. Estébanez
2021-02-10 19:22:13 +01:00
parent 8870f43d74
commit 8e128726f0
58 changed files with 650 additions and 639 deletions
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26
core/os/memory.cpp
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@@ -60,11 +60,11 @@ void operator delete(void *p_mem, void *p_pointer, size_t check, const char *p_d
#endif
#ifdef DEBUG_ENABLED
uint64_t Memory::mem_usage = 0;
uint64_t Memory::max_usage = 0;
SafeNumeric<uint64_t> Memory::mem_usage;
SafeNumeric<uint64_t> Memory::max_usage;
#endif
uint64_t Memory::alloc_count = 0;
SafeNumeric<uint64_t> Memory::alloc_count;
void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
#ifdef DEBUG_ENABLED
@@ -77,7 +77,7 @@ void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
ERR_FAIL_COND_V(!mem, nullptr);
atomic_increment(&alloc_count);
alloc_count.increment();
if (prepad) {
uint64_t *s = (uint64_t *)mem;
@@ -86,8 +86,8 @@ void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
uint8_t *s8 = (uint8_t *)mem;
#ifdef DEBUG_ENABLED
atomic_add(&mem_usage, p_bytes);
atomic_exchange_if_greater(&max_usage, mem_usage);
uint64_t new_mem_usage = mem_usage.add(p_bytes);
max_usage.exchange_if_greater(new_mem_usage);
#endif
return s8 + PAD_ALIGN;
} else {
@@ -114,10 +114,10 @@ void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
#ifdef DEBUG_ENABLED
if (p_bytes > *s) {
atomic_add(&mem_usage, p_bytes - *s);
atomic_exchange_if_greater(&max_usage, mem_usage);
uint64_t new_mem_usage = mem_usage.add(p_bytes - *s);
max_usage.exchange_if_greater(new_mem_usage);
} else {
atomic_sub(&mem_usage, *s - p_bytes);
mem_usage.sub(*s - p_bytes);
}
#endif
@@ -156,14 +156,14 @@ void Memory::free_static(void *p_ptr, bool p_pad_align) {
bool prepad = p_pad_align;
#endif
atomic_decrement(&alloc_count);
alloc_count.decrement();
if (prepad) {
mem -= PAD_ALIGN;
#ifdef DEBUG_ENABLED
uint64_t *s = (uint64_t *)mem;
atomic_sub(&mem_usage, *s);
mem_usage.sub(*s);
#endif
free(mem);
@@ -178,7 +178,7 @@ uint64_t Memory::get_mem_available() {
uint64_t Memory::get_mem_usage() {
#ifdef DEBUG_ENABLED
return mem_usage;
return mem_usage.get();
#else
return 0;
#endif
@@ -186,7 +186,7 @@ uint64_t Memory::get_mem_usage() {
uint64_t Memory::get_mem_max_usage() {
#ifdef DEBUG_ENABLED
return max_usage;
return max_usage.get();
#else
return 0;
#endif