From af7d75b728d655680b327dbd4a9f87304949e5de Mon Sep 17 00:00:00 2001
From: Gregory Wells <me@gregorywells.dev>
Date: Sat, 9 Aug 2025 20:04:34 -0400
Subject: [PATCH] write the allocators layer

---
 projects/core/gryphn_allocators.h             | 17 ++++++++
 .../allocators/CMakeLists.txt                 | 10 +++++
 .../allocators/allocator_checker.c            | 39 +++++++++++++++++++
 .../allocators/allocator_checker.h            |  7 ++++
 4 files changed, 73 insertions(+)
 create mode 100644 projects/core/gryphn_allocators.h
 create mode 100644 projects/validation_layers/allocators/CMakeLists.txt
 create mode 100644 projects/validation_layers/allocators/allocator_checker.c
 create mode 100644 projects/validation_layers/allocators/allocator_checker.h

diff --git a/projects/core/gryphn_allocators.h b/projects/core/gryphn_allocators.h
new file mode 100644
index 0000000..965236f
--- /dev/null
+++ b/projects/core/gryphn_allocators.h
@@ -0,0 +1,17 @@
+#pragma once
+#include <stdlib.h>
+
+typedef void* (*PFN_gnMalloc)   (size_t size, void* userData);
+typedef void* (*PFN_gnCalloc)   (int cnt, size_t size, void* userData);
+typedef void* (*PFN_gnRealloc)  (void* ptr, size_t size, void* userData);
+typedef void  (*PFN_gnFree)     (void* ptr, void* userData);
+
+typedef struct gnAllocators {
+    void* userData;
+    PFN_gnMalloc  malloc;
+    PFN_gnCalloc  calloc;
+    PFN_gnRealloc realloc;
+    PFN_gnFree    free;
+} gnAllocators;
+
+#define gnMalloc(allocators, size) allocators->malloc(size, allocators->userData)
diff --git a/projects/validation_layers/allocators/CMakeLists.txt b/projects/validation_layers/allocators/CMakeLists.txt
new file mode 100644
index 0000000..58bd50c
--- /dev/null
+++ b/projects/validation_layers/allocators/CMakeLists.txt
@@ -0,0 +1,10 @@
+set(CMAKE_EXPORT_COMPILE_COMMANDS on)
+project(GryphnAllocatorChecker)
+add_library(GryphnAllocatorChecker STATIC allocator_checker.c)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../core/src/)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../platform/)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../utils)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../core/)
+target_include_directories(GryphnAllocatorChecker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../../extensions/)
diff --git a/projects/validation_layers/allocators/allocator_checker.c b/projects/validation_layers/allocators/allocator_checker.c
new file mode 100644
index 0000000..2996856
--- /dev/null
+++ b/projects/validation_layers/allocators/allocator_checker.c
@@ -0,0 +1,39 @@
+#include "allocator_checker.h"
+#include <core/src/gryphn_handles.h>
+#include "core/src/instance/gryphn_debugger.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+void* gnMallocFunc (size_t size, void* userData) {
+    char outBuffer[500];
+    snprintf(outBuffer, sizeof(outBuffer), "Allocating %lu bytes with malloc", size);
+
+    gnDebuggerSetVerboseMessage(userData, (gnMessageData) {
+        .message = gnCreateString(outBuffer)
+    });
+    return malloc(size);
+}
+void* gnCallocFunc (int cnt, size_t size, void* userData) {
+    char outBuffer[500];
+    snprintf(outBuffer, sizeof(outBuffer), "Allocating %i items of %lu bytes with calloc", cnt, size);
+    gnDebuggerSetVerboseMessage(userData, (gnMessageData){
+        .message = gnCreateString(outBuffer)
+    });
+    return calloc(cnt, size);
+}
+void* gnReallocFunc (void* ptr, size_t size, void* userData) {
+    char outBuffer[500];
+    snprintf(outBuffer, sizeof(outBuffer), "Reallocating %p with new size %lu", ptr, size);
+    gnDebuggerSetVerboseMessage(userData, (gnMessageData){
+        .message = gnCreateString(outBuffer)
+    });
+    return realloc(ptr, size);
+}
+void gnFreeFunc (void* ptr, void* userData) {
+    char outBuffer[500];
+    snprintf(outBuffer, sizeof(outBuffer), "Freeing %p", ptr);
+    gnDebuggerSetVerboseMessage(userData, (gnMessageData){
+        .message = gnCreateString(outBuffer)
+    });
+    free(ptr);
+}
diff --git a/projects/validation_layers/allocators/allocator_checker.h b/projects/validation_layers/allocators/allocator_checker.h
new file mode 100644
index 0000000..397af88
--- /dev/null
+++ b/projects/validation_layers/allocators/allocator_checker.h
@@ -0,0 +1,7 @@
+#pragma once
+#include <stddef.h>
+
+void* gnMallocFunc (size_t size, void* userData);
+void* gnCallocFunc (int cnt, size_t size, void* userData);
+void* gnReallocFunc (void* ptr, size_t size, void* userData);
+void  gnFreeFunc (void* ptr, void* userData);