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[Feat] (Pipe): land the P4a contract - the resource target enum, the framebuffer target byte, the texture params' builtin sampler, the sampler-parameter field table, four subsystem bits, seven dirty arms and the program archive codec

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swung0x48
2026-09-08 12:18:29 -04:00
parent 37da3c3a07
commit 08192d7266
43 changed files with 3802 additions and 145 deletions
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MobileGL/MG_Impl/Pipe/SlotAllocator.cpp
+105 -24
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@@ -35,6 +35,22 @@ namespace MobileGL::MG_Pipe {
return m_kinds[index < kKindCount ? index : 0];
}
MGPipeSlotAllocator::SlotState* MGPipeSlotAllocator::EntryOf(KindState& state, MGPipeKind kind,
Uint32 slot) {
if (kind == MGPipeKind::ShaderCso && MGPipeIsCompositeShaderSlot(slot)) {
const SizeT index = slot - kMGPipeShaderCsoCompositeSlotBase;
if (index >= state.BandSlots.size()) return nullptr;
return &state.BandSlots[index];
}
if (slot >= state.Slots.size()) return nullptr;
return &state.Slots[slot];
}
const MGPipeSlotAllocator::SlotState*
MGPipeSlotAllocator::EntryOf(const KindState& state, MGPipeKind kind, Uint32 slot) {
return EntryOf(const_cast<KindState&>(state), kind, slot);
}
MGPipeHandle MGPipeSlotAllocator::Allocate(MGPipeKind kind) {
KindState& state = StateOf(kind);
if (state.Slots.empty()) {
@@ -94,14 +110,67 @@ namespace MobileGL::MG_Pipe {
return handle;
}
MGPipeHandle MGPipeSlotAllocator::AllocateComposite(Uint64 lifetimeId) {
// P4a, D-H7. The mirror image of Allocate() above, restricted to the band that one
// refuses, and kept in a table of its own so both spaces stay DENSE: the band's base
// is 983040, and minting one composite into the slot-indexed vector would allocate
// ~23 MB of SlotState for a single program pipeline.
KindState& state = StateOf(MGPipeKind::ShaderCso);
Uint32 slot = 0;
Bool reused = false;
if (!state.BandFreeList.empty()) {
slot = state.BandFreeList.back();
state.BandFreeList.pop_back();
reused = true;
}
if (!reused) {
const SizeT next = kMGPipeShaderCsoCompositeSlotBase + state.BandSlots.size();
slot = static_cast<Uint32>(next);
// The band's own exhaustion assert, mirroring Allocate()'s: a composite that
// cannot be minted is a NAMED failure, not a silent fall-through into the ordinary
// program slots, which is exactly what reserving a band rather than setting a flag
// buys.
MOBILEGL_ASSERT(next < kMGPipeShaderCsoSlotLimit,
"the MGPipe ShaderCso COMPOSITE band is exhausted at slot %zu; a "
"program-pipeline composite cannot be minted and must not take an "
"ordinary program's slot",
next);
if (next >= kMGPipeShaderCsoSlotLimit) return kMGPipeNullHandle;
state.BandSlots.emplace_back();
}
SlotState* entry = EntryOf(state, MGPipeKind::ShaderCso, slot);
if (entry == nullptr) return kMGPipeNullHandle;
if (entry->EverHandedOut) {
MOBILEGL_ASSERT(entry->Gen != ~Uint32{0},
"MGPipe handle generation wrapped on the ShaderCso composite band, "
"slot %u; {slot, gen} is no longer unique",
slot);
++entry->Gen;
}
entry->EverHandedOut = true;
entry->Live = true;
entry->LifetimeId = lifetimeId;
++state.LiveCount;
if (lifetimeId != 0) {
MOBILEGL_ASSERT(state.ByLifetimeId.find(lifetimeId) == state.ByLifetimeId.end(),
"lifetime id %llu already owns a ShaderCso slot",
static_cast<unsigned long long>(lifetimeId));
state.ByLifetimeId[lifetimeId] = slot;
}
return MGPipeHandle{slot, entry->Gen};
}
MGPipeHandle MGPipeSlotAllocator::FindByLifetimeId(MGPipeKind kind, Uint64 lifetimeId) const {
if (lifetimeId == 0) return kMGPipeNullHandle;
const KindState& state = StateOf(kind);
const auto it = state.ByLifetimeId.find(lifetimeId);
if (it == state.ByLifetimeId.end()) return kMGPipeNullHandle;
const Uint32 slot = it->second;
if (slot >= state.Slots.size() || !state.Slots[slot].Live) return kMGPipeNullHandle;
return MGPipeHandle{slot, state.Slots[slot].Gen};
const SlotState* entry = EntryOf(state, kind, it->second);
if (entry == nullptr || !entry->Live) return kMGPipeNullHandle;
return MGPipeHandle{it->second, entry->Gen};
}
MGPipeHandle MGPipeSlotAllocator::Acquire(MGPipeKind kind, Uint64 lifetimeId) {
@@ -112,56 +181,68 @@ namespace MobileGL::MG_Pipe {
void MGPipeSlotAllocator::Free(MGPipeKind kind, MGPipeHandle handle) {
KindState& state = StateOf(kind);
if (handle.Slot >= state.Slots.size()) return;
SlotState& entry = state.Slots[handle.Slot];
SlotState* entry = EntryOf(state, kind, handle.Slot);
if (entry == nullptr) return;
// A stale handle must not free the slot its successor now owns - that is the whole
// reason the generation is in the key.
if (!entry.Live || entry.Gen != handle.Gen) return;
if (entry.LifetimeId != 0) {
const auto it = state.ByLifetimeId.find(entry.LifetimeId);
// reason the generation is in the key. It is also what makes the SECOND of a
// composite's two independent release paths a proven no-op.
if (!entry->Live || entry->Gen != handle.Gen) return;
if (entry->LifetimeId != 0) {
const auto it = state.ByLifetimeId.find(entry->LifetimeId);
if (it != state.ByLifetimeId.end() && it->second == handle.Slot) {
state.ByLifetimeId.erase(it);
}
}
entry.Live = false;
entry.LifetimeId = 0;
entry->Live = false;
entry->LifetimeId = 0;
--state.LiveCount;
state.FreeList.push_back(handle.Slot);
if (kind == MGPipeKind::ShaderCso && MGPipeIsCompositeShaderSlot(handle.Slot)) {
state.BandFreeList.push_back(handle.Slot);
} else {
state.FreeList.push_back(handle.Slot);
}
}
Bool MGPipeSlotAllocator::IsLive(MGPipeKind kind, MGPipeHandle handle) const {
const KindState& state = StateOf(kind);
if (handle.Slot >= state.Slots.size()) return false;
const SlotState& entry = state.Slots[handle.Slot];
return entry.Live && entry.Gen == handle.Gen;
const SlotState* entry = EntryOf(StateOf(kind), kind, handle.Slot);
return entry != nullptr && entry->Live && entry->Gen == handle.Gen;
}
Uint32 MGPipeSlotAllocator::GenOfSlot(MGPipeKind kind, Uint32 slot) const {
const KindState& state = StateOf(kind);
if (slot >= state.Slots.size()) return 0;
return state.Slots[slot].Gen;
const SlotState* entry = EntryOf(StateOf(kind), kind, slot);
return entry != nullptr ? entry->Gen : 0;
}
Uint64 MGPipeSlotAllocator::LifetimeIdOfSlot(MGPipeKind kind, Uint32 slot) const {
const KindState& state = StateOf(kind);
if (slot >= state.Slots.size()) return 0;
return state.Slots[slot].LifetimeId;
const SlotState* entry = EntryOf(StateOf(kind), kind, slot);
return entry != nullptr ? entry->LifetimeId : 0;
}
Uint32 MGPipeSlotAllocator::HighWater(MGPipeKind kind) const {
return static_cast<Uint32>(StateOf(kind).Slots.size());
const KindState& state = StateOf(kind);
// Literally "one past the highest slot ever handed out", composites included, so a
// leaked composite slot moves it exactly as a leaked ordinary one does - which is what
// the per-kind leak cases assert on and what would otherwise make the composite case
// green for ever and mean nothing.
if (!state.BandSlots.empty()) {
return static_cast<Uint32>(kMGPipeShaderCsoCompositeSlotBase + state.BandSlots.size());
}
return static_cast<Uint32>(state.Slots.size());
}
Uint32 MGPipeSlotAllocator::LiveCount(MGPipeKind kind) const { return StateOf(kind).LiveCount; }
Uint32 MGPipeSlotAllocator::FreeCount(MGPipeKind kind) const {
return static_cast<Uint32>(StateOf(kind).FreeList.size());
const KindState& state = StateOf(kind);
return static_cast<Uint32>(state.FreeList.size() + state.BandFreeList.size());
}
void MGPipeSlotAllocator::Reset() {
for (KindState& state : m_kinds) {
state.Slots.clear();
state.FreeList.clear();
state.BandSlots.clear();
state.BandFreeList.clear();
state.ByLifetimeId.clear();
state.LiveCount = 0;
}