Restructure the library layers

src/base/mem/allocator/mem_allocator.c

@@ -0,0 +1,35 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#include "mem_allocator.h"
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/assert/assert.h"
+#include <stdlib.h>
+
+void *wapp_mem_allocator_alloc(const Allocator *allocator, u64 size) {
+  wapp_debug_assert(allocator != NULL && (allocator->alloc) != NULL, "`allocator` and `allocator->alloc` should not be NULL");
+  return allocator->alloc(size, allocator->obj);
+}
+
+void *wapp_mem_allocator_alloc_aligned(const Allocator *allocator, u64 size, u64 alignment) {
+  wapp_debug_assert(allocator != NULL && (allocator->alloc_aligned) != NULL, "`allocator` and `allocator->alloc_aligned` should not be NULL");
+  return allocator->alloc_aligned(size, alignment, allocator->obj);
+}
+
+void *wapp_mem_allocator_realloc(const Allocator *allocator, void *ptr, u64 old_size, u64 new_size) {
+  wapp_debug_assert(allocator != NULL && (allocator->realloc) != NULL, "`allocator` and `allocator->realloc` should not be NULL");
+  return allocator->realloc(ptr, old_size, new_size, allocator->obj);
+}
+
+void *wapp_mem_allocator_realloc_aligned(const Allocator *allocator, void *ptr, u64 old_size,
+                                         u64 new_size, u64 alignment) {
+  wapp_debug_assert(allocator != NULL && (allocator->realloc_aligned) != NULL, "`allocator` and `allocator->realloc_aligned` should not be NULL");
+  return allocator->realloc_aligned(ptr, old_size, new_size, alignment, allocator->obj);
+}
+
+void wapp_mem_allocator_free(const Allocator *allocator, void **ptr, u64 size) {
+  if (!allocator || !(allocator->free)) {
+    return;
+  }
+
+  allocator->free(ptr, size, allocator->obj);
+}

src/base/mem/allocator/mem_allocator.h

@@ -0,0 +1,50 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef MEM_ALLOCATOR_H
+#define MEM_ALLOCATOR_H
+
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/platform/platform.h"
+#include <string.h>
+
+#ifdef WAPP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+typedef void *(MemAllocFunc)(u64 size, void *alloc_obj);
+typedef void *(MemAllocAlignedFunc)(u64 size, u64 alignment, void *alloc_obj);
+typedef void *(MemReallocFunc)(void *ptr, u64 old_size, u64 new_size, void *alloc_obj);
+typedef void *(MemReallocAlignedFunc)(void *ptr, u64 old_size, u64 new_size, u64 alignment, void *alloc_obj);
+typedef void  (MemFreeFunc)(void **ptr, u64 size, void *alloc_obj);
+
+typedef struct allocator Allocator;
+struct allocator {
+  void *obj;
+  MemAllocFunc *alloc;
+  MemAllocAlignedFunc *alloc_aligned;
+  MemReallocFunc *realloc;
+  MemReallocAlignedFunc *realloc_aligned;
+  MemFreeFunc *free;
+};
+
+#ifdef WAPP_PLATFORM_CPP
+#define wapp_mem_allocator_invalid(ALLOCATOR) ([&]() {      \
+  Allocator alloc{};                                        \
+  return memcmp(ALLOCATOR, &alloc, sizeof(Allocator)) == 0; \
+}())
+#else
+#define wapp_mem_allocator_invalid(ALLOCATOR) (memcmp(ALLOCATOR, &((Allocator){0}), sizeof(Allocator)) == 0)
+#endif // !WAPP_PLATFORM_CPP
+
+void *wapp_mem_allocator_alloc(const Allocator *allocator, u64 size);
+void *wapp_mem_allocator_alloc_aligned(const Allocator *allocator, u64 size, u64 alignment);
+void *wapp_mem_allocator_realloc(const Allocator *allocator, void *ptr, u64 old_size, u64 new_size);
+void *wapp_mem_allocator_realloc_aligned(const Allocator *allocator, void *ptr, u64 old_size,
+                                         u64 new_size, u64 alignment);
+void wapp_mem_allocator_free(const Allocator *allocator, void **ptr, u64 size);
+
+#ifdef WAPP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+#endif // !MEM_ALLOCATOR_H

src/base/mem/utils/mem_utils.c

@@ -0,0 +1,26 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#include "mem_utils.h"
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/assert/assert.h"
+#include <stddef.h>
+
+wapp_intern b8 is_power_of_two(u64 num) { return (num & (num - 1)) == 0; }
+
+void *wapp_mem_util_align_forward(void *ptr, u64 alignment) {
+  wapp_debug_assert(ptr != NULL, "`ptr` should not be NULL");
+  wapp_runtime_assert(is_power_of_two(alignment), "`alignment` value is not a power of two");
+
+  uptr p = (uptr)ptr;
+  uptr align = (uptr)alignment;
+
+  // Similar to p % align, but it's a faster implementation that works fine
+  // because align is guaranteed to be a power of 2
+  uptr modulo = p & (align - 1);
+
+  if (modulo != 0) {
+    p += align - modulo;
+  }
+
+  return (void *)p;
+}

src/base/mem/utils/mem_utils.h

@@ -0,0 +1,19 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef MEM_UTILS_H
+#define MEM_UTILS_H
+
+#include "../../../common/aliases/aliases.h"
+#include "../../../common/platform/platform.h"
+
+#ifdef WAPP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+void *wapp_mem_util_align_forward(void *ptr, u64 alignment);
+
+#ifdef WAPP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+#endif // !MEM_UTILS_H