From 03e1249177b2c6aa22a917c742d9b057f5640e27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aurimas=20Bla=C5=BEulionis?= <0x60@pm.me>
Date: Fri, 5 Oct 2018 20:42:14 +0300
Subject: [PATCH] Remove constant heap allocations and deallocations when using
 WriteList.

---
 hlapi/hlapi.h        | 8 +++++---
 hlapi/winprocess.cpp | 7 +++++--
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/hlapi/hlapi.h b/hlapi/hlapi.h
index 77576d6..626a66e 100644
--- a/hlapi/hlapi.h
+++ b/hlapi/hlapi.h
@@ -9,6 +9,7 @@
 #include <stdexcept>
 #include <string.h>
 #include <vector>
+#include <algorithm>
 
 class VMException : public std::exception
 {
@@ -146,13 +147,14 @@ class WriteList
 	template<typename T>
 	void Write(uint64_t address, T& value)
 	{
-		T* copy = (T*)malloc(sizeof(T));
-		*copy = value;
-		writeList.push_back({(uint64_t)copy, address, sizeof(T)});
+		writeList.push_back({(uint64_t)buffer.size(), address, sizeof(T)});
+		buffer.reserve(sizeof(T));
+		std::copy((char*)&value, (char*)&value + sizeof(T), std::back_inserter(buffer));
 	}
 
   private:
 	std::vector<RWInfo> writeList;
+	std::vector<char> buffer;
 	WinCtx* ctx;
 	WinProc* proc;
 };
diff --git a/hlapi/winprocess.cpp b/hlapi/winprocess.cpp
index acb9cc6..81da995 100644
--- a/hlapi/winprocess.cpp
+++ b/hlapi/winprocess.cpp
@@ -37,12 +37,15 @@ void WriteList::Commit()
 
 	RWInfo* infos = writeList.data();
 
-	VMemWriteMul(&ctx->process, proc->dirBase, infos, sz);
+	uint64_t bufmem = (uint64_t)buffer.data();
 
 	for (size_t i = 0; i < sz; i++)
-		free((void*)infos[i].local);
+		infos[i].local += bufmem;
+
+	VMemWriteMul(&ctx->process, proc->dirBase, infos, sz);
 
 	writeList.clear();
+	buffer.clear();
 }
 
 WinDll* WinProcess::GetModuleInfo(const char* moduleName)