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progress on base, deciding to keep the MD namespace minimal on macros pre-c11 or cpp17 gen refactors

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ed
2025-02-05 11:20:32 -05:00
parent c1d24b3a07
commit 8936ae9aa7
15 changed files with 370 additions and 246 deletions
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code/base/memory_substrate.h
+16 -20
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@@ -3,8 +3,9 @@
# include "context_cracking.h"
# include "linkage.h"
# include "macros.h"
# include "linkage.h"
# include "platform.h"
# include "base_types.h"
# include "memory.h"
#endif
// This provides an alterntive memory strategy to HMH/Casey Muratori/RJF styled arenas
@@ -12,29 +13,10 @@
// is related to the gb headers an thus the Odin-lang memory strategy
// Users can override the underlying memory allocator used, even for the HMH arena memory strategy.
#define MD_KILOBYTES( x ) ( ( x ) * ( S64 )( 1024 ) )
#define MD_MEGABYTES( x ) ( MD_KILOBYTES( x ) * ( S64 )( 1024 ) )
#define MD_GIGABYTES( x ) ( MD_MEGABYTES( x ) * ( S64 )( 1024 ) )
#define MD_TERABYTES( x ) ( MD_GIGABYTES( x ) * ( S64 )( 1024 ) )
#define MD__ONES ( scast( GEN_NS usize, - 1) / MD_U8_MAX )
#define MD__HIGHS ( MD__ONES * ( MD_U8_MAX / 2 + 1 ) )
#define MD__HAS_ZERO( x ) ( ( ( x ) - MD__ONES ) & ~( x ) & MD__HIGHS )
#if MD_COMPILER_MSVC || (MD_COMPILER_CLANG && MD_OS_WINDOWS)
# pragma section(".rdata$", read)
# define read_only __declspec(allocate(".rdata$"))
#elif (MD_COMPILER_CLANG && MD_OS_LINUX)
# define read_only __attribute__((section(".rodata")))
#else
// NOTE(rjf): I don't know of a useful way to do this in GCC land.
// __attribute__((section(".rodata"))) looked promising, but it introduces a
// strange warning about malformed section attributes, and it doesn't look
// like writing to that section reliably produces access violations, strangely
// enough. (It does on Clang)
# define read_only
#endif
typedef U32 AllocType;
enum AllocType enum_underlying(U32)
{
@@ -114,3 +96,17 @@ MD_API void* heap_allocator_proc( void* allocator_data, AllocType type, SSIZE si
//! Helper to free memory allocated by heap allocator.
#define mfree( ptr ) free( heap(), ptr )
typedef struct VMem;
struct VMem {
U32 cmt_size;
U32 res_size;
U64 base_pos;
};
AllocatorInfo vm_allocator(VMem* vm) {
AllocatorInfo info = { vm_allocator_proc, vm }
return info
}
MD_API void* vm_allocator_proc(void * allocator_data, AllocType type, SSIZE size, SSIZE alignment, void* old_memory, SSIZE old_size, U64 flags);