From b7a3c4526990d6601ff2cac748ff860cda6bc16d Mon Sep 17 00:00:00 2001
From: vaxerski <vaxry@vaxry.net>
Date: Fri, 17 Jan 2025 18:21:34 +0100
Subject: core: add LIKELY and UNLIKELY macros

helps the compiler optimize
---
 src/protocols/core/Compositor.cpp | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

(limited to 'src/protocols/core/Compositor.cpp')

diff --git a/src/protocols/core/Compositor.cpp b/src/protocols/core/Compositor.cpp
index e1d6ef7d..93683993 100644
--- a/src/protocols/core/Compositor.cpp
+++ b/src/protocols/core/Compositor.cpp
@@ -34,7 +34,7 @@ void CWLCallbackResource::send(timespec* now) {
 }
 
 CWLRegionResource::CWLRegionResource(SP<CWlRegion> resource_) : resource(resource_) {
-    if (!good())
+    if UNLIKELY (!good())
         return;
 
     resource->setData(this);
@@ -56,7 +56,7 @@ SP<CWLRegionResource> CWLRegionResource::fromResource(wl_resource* res) {
 }
 
 CWLSurfaceResource::CWLSurfaceResource(SP<CWlSurface> resource_) : resource(resource_) {
-    if (!good())
+    if UNLIKELY (!good())
         return;
 
     pClient = resource->client();
@@ -187,20 +187,20 @@ void CWLSurfaceResource::enter(PHLMONITOR monitor) {
     if (std::find(enteredOutputs.begin(), enteredOutputs.end(), monitor) != enteredOutputs.end())
         return;
 
-    if (!PROTO::outputs.contains(monitor->szName)) {
+    if UNLIKELY (!PROTO::outputs.contains(monitor->szName)) {
         // can happen on unplug/replug
         LOGM(ERR, "enter() called on a non-existent output global");
         return;
     }
 
-    if (PROTO::outputs.at(monitor->szName)->isDefunct()) {
+    if UNLIKELY (PROTO::outputs.at(monitor->szName)->isDefunct()) {
         LOGM(ERR, "enter() called on a defunct output global");
         return;
     }
 
     auto output = PROTO::outputs.at(monitor->szName)->outputResourceFrom(pClient);
 
-    if (!output || !output->getResource() || !output->getResource()->resource()) {
+    if UNLIKELY (!output || !output->getResource() || !output->getResource()->resource()) {
         LOGM(ERR, "Cannot enter surface {:x} to {}, client hasn't bound the output", (uintptr_t)this, monitor->szName);
         return;
     }
@@ -211,12 +211,12 @@ void CWLSurfaceResource::enter(PHLMONITOR monitor) {
 }
 
 void CWLSurfaceResource::leave(PHLMONITOR monitor) {
-    if (std::find(enteredOutputs.begin(), enteredOutputs.end(), monitor) == enteredOutputs.end())
+    if UNLIKELY (std::find(enteredOutputs.begin(), enteredOutputs.end(), monitor) == enteredOutputs.end())
         return;
 
     auto output = PROTO::outputs.at(monitor->szName)->outputResourceFrom(pClient);
 
-    if (!output) {
+    if UNLIKELY (!output) {
         LOGM(ERR, "Cannot leave surface {:x} from {}, client hasn't bound the output", (uintptr_t)this, monitor->szName);
         return;
     }
@@ -332,7 +332,7 @@ uint32_t CWLSurfaceResource::id() {
 }
 
 void CWLSurfaceResource::map() {
-    if (mapped)
+    if UNLIKELY (mapped)
         return;
 
     mapped = true;
@@ -346,7 +346,7 @@ void CWLSurfaceResource::map() {
 }
 
 void CWLSurfaceResource::unmap() {
-    if (!mapped)
+    if UNLIKELY (!mapped)
         return;
 
     mapped = false;
@@ -385,10 +385,10 @@ CBox CWLSurfaceResource::extends() {
 }
 
 Vector2D CWLSurfaceResource::sourceSize() {
-    if (!current.texture)
+    if UNLIKELY (!current.texture)
         return {};
 
-    if (current.viewport.hasSource)
+    if UNLIKELY (current.viewport.hasSource)
         return current.viewport.source.size();
 
     Vector2D trc = current.transform % 2 == 1 ? Vector2D{current.bufferSize.y, current.bufferSize.x} : current.bufferSize;
@@ -396,7 +396,7 @@ Vector2D CWLSurfaceResource::sourceSize() {
 }
 
 CRegion CWLSurfaceResource::accumulateCurrentBufferDamage() {
-    if (!current.texture)
+    if UNLIKELY (!current.texture)
         return {};
 
     CRegion surfaceDamage = current.damage;
@@ -495,7 +495,7 @@ void CWLSurfaceResource::commitPendingState() {
 void CWLSurfaceResource::updateCursorShm(CRegion damage) {
     auto buf = current.buffer ? current.buffer->buffer : lastBuffer;
 
-    if (!buf)
+    if UNLIKELY (!buf)
         return;
 
     auto& shmData  = CCursorSurfaceRole::cursorPixelData(self.lock());
@@ -545,7 +545,7 @@ void CWLSurfaceResource::presentFeedback(timespec* when, PHLMONITOR pMonitor, bo
 }
 
 CWLCompositorResource::CWLCompositorResource(SP<CWlCompositor> resource_) : resource(resource_) {
-    if (!good())
+    if UNLIKELY (!good())
         return;
 
     resource->setOnDestroy([this](CWlCompositor* r) { PROTO::compositor->destroyResource(this); });
@@ -553,7 +553,7 @@ CWLCompositorResource::CWLCompositorResource(SP<CWlCompositor> resource_) : reso
     resource->setCreateSurface([](CWlCompositor* r, uint32_t id) {
         const auto RESOURCE = PROTO::compositor->m_vSurfaces.emplace_back(makeShared<CWLSurfaceResource>(makeShared<CWlSurface>(r->client(), r->version(), id)));
 
-        if (!RESOURCE->good()) {
+        if UNLIKELY (!RESOURCE->good()) {
             r->noMemory();
             PROTO::compositor->m_vSurfaces.pop_back();
             return;
@@ -569,7 +569,7 @@ CWLCompositorResource::CWLCompositorResource(SP<CWlCompositor> resource_) : reso
     resource->setCreateRegion([](CWlCompositor* r, uint32_t id) {
         const auto RESOURCE = PROTO::compositor->m_vRegions.emplace_back(makeShared<CWLRegionResource>(makeShared<CWlRegion>(r->client(), r->version(), id)));
 
-        if (!RESOURCE->good()) {
+        if UNLIKELY (!RESOURCE->good()) {
             r->noMemory();
             PROTO::compositor->m_vRegions.pop_back();
             return;
@@ -592,7 +592,7 @@ CWLCompositorProtocol::CWLCompositorProtocol(const wl_interface* iface, const in
 void CWLCompositorProtocol::bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id) {
     const auto RESOURCE = m_vManagers.emplace_back(makeShared<CWLCompositorResource>(makeShared<CWlCompositor>(client, ver, id)));
 
-    if (!RESOURCE->good()) {
+    if UNLIKELY (!RESOURCE->good()) {
         wl_client_post_no_memory(client);
         m_vManagers.pop_back();
         return;
-- 
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