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metadesk/source/base/memory.h
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#ifdef INTELLISENSE_DIRECTIVES
# pragma once
# include "context_cracking.h"
# include "linkage.h"
# include "macros.h"
# include "platform.h"
# include "base_types.h"
#endif
////////////////////////////////
//~ rjf: Units
#ifndef KILOBTYES
#define MD_KILOBYTES( x ) ( ( x ) * ( MD_S64 )( 1024 ) )
#endif
#ifndef MD_MEGABYTES
#define MD_MEGABYTES( x ) ( MD_KILOBYTES( x ) * ( MD_S64 )( 1024 ) )
#endif
#ifndef MD_GIGABYTES
#define MD_GIGABYTES( x ) ( MD_MEGABYTES( x ) * ( MD_S64 )( 1024 ) )
#endif
#ifndef MD_TERABYTES
#define MD_TERABYTES( x ) ( MD_GIGABYTES( x ) * ( MD_S64 )( 1024 ) )
#endif
#ifndef MD_KB
#define MD_KB(n) (((MD_U64)(n)) << 10)
#endif
#ifndef MD_MB
#define MD_MB(n) (((MD_U64)(n)) << 20)
#endif
#ifndef MD_GB
#define MD_GB(n) (((MD_U64)(n)) << 30)
#endif
#ifndef MD_TB
#define MD_TB(n) (((MD_U64)(n)) << 40)
#endif
#ifndef md_thousand
#define thousand(n) ((n) * 1000)
#endif
#ifndef md_million
#define md_million(n) ((n) * 1000000)
#endif
#ifndef md_billion
#define md_billion(n) ((n) * 1000000000)
#endif
////////////////////////////////
//~ rjf: Type -> Alignment
#ifndef md_align_of
# if MD_COMPILER_MSVC
# define md_align_of(T) __alignof(T)
# elif MD_COMPILER_CLANG
# define md_align_of(T) __alignof(T)
# elif MD_COMPILER_GCC
# define md_align_of(T) __alignof__(T)
# else
# error AlignOf not defined for this compiler.
# endif
#endif
////////////////////////////////
//~ rjf: Member Offsets
#ifndef md_member
#define md_member(T, m) ( ((T*) 0)->m )
#endif
#ifndef md_offset_of
#define md_offset_of(T, m) md_int_from_ptr(& md_member(T, m))
#endif
#ifndef md_member_from_offset
#define md_member_from_offset(T, ptr, off) (T) ((((MD_U8 *) ptr) + (off)))
#endif
#ifndef md_cast_from_member
#define md_cast_from_member(T, m, ptr) (T*) (((MD_U8*)ptr) - md_offset_of(T, m))
#endif
////////////////////////////////
//~ rjf: Memory Operation Macros
// TODO(Ed): Review usage of memmove here...(I guess wanting to avoid overlap faults..)
#ifndef md_memory_copy
# if MD_OS_WINDOWS
void* memcpy_intrinsic(void* dest, const void* src, size_t count)
{
if (dest == NULL || src == NULL || count == 0) {
return NULL;
}
__movsb((unsigned char*)dest, (const unsigned char*)src, count);
return dest;
}
# define md_memory_copy(dst, src, size) memcpy_intrinsic((dst), (src), (size))
# else
# define md_memory_copy(dst, src, size) memmove((dst), (src), (size))
# endif
#endif
#ifndef md_memory_set
# if USE_VENDOR_MEMORY_OPS
# define md_memory_set(dst, byte, size) memset((dst), (byte), (size))
# else
# define md_memory_set(dst, byte, size) md_mem_set((dst), (byte), (size))
# endif
#endif
#ifndef md_memory_compare
#define md_memory_compare(a, b, size) memcmp((a), (b), (size))
#endif
#ifndef md_memory_str_len
#define md_memory_str_len(ptr) cstr_len(ptr)
#endif
#ifndef md_memory_copy_struct
#define md_memory_copy_struct(d, s) md_memory_copy((d), (s), sizeof( *(d)))
#endif
#ifndef md_memory_copy_array
#define md_memory_copy_array(d, s) md_memory_copy((d), (s), sizeof( d))
#endif
#ifndef md_memory_copy_type
#define md_memory_copy_type(d, s, c) md_memory_copy((d), (s), sizeof( *(d)) * (c))
#endif
#ifndef md_memory_zero
#define md_memory_zero(s,z) md_memory_set((s), 0, (z))
#endif
#ifndef md_memory_zero_struct
#define md_memory_zero_struct(s) md_memory_zero((s), sizeof( *(s)))
#endif
#ifndef md_memory_zero_array
#define md_memory_zero_array(a) md_memory_zero((a), sizeof(a))
#endif
#ifndef md_memory_zero_type
#define md_memory_zero_type(m, c) md_memory_zero((m), sizeof( *(m)) * (c))
#endif
#ifndef md_memory_match
#define md_memory_match(a, b, z) (md_memory_compare((a), (b), (z)) == 0)
#endif
#ifndef md_memory_match_struct
#define md_memory_match_struct(a, b) md_memory_match((a), (b), sizeof(*(a)))
#endif
#ifndef md_memory_match_array
#define md_memory_match_array(a, b) md_memory_match((a), (b), sizeof(a))
#endif
#ifndef md_memory_read
#define md_memory_read(T, p, e) ( ((p) + sizeof(T) <= (e)) ? ( *(T*)(p)) : (0) )
#endif
#ifndef md_memory_consume
#define md_memory_consume(T, p, e) ( ((p) + sizeof(T) <= (e)) ? ((p) += sizeof(T), *(T*)((p) - sizeof(T))) : ((p) = (e),0) )
#endif
////////////////////////////////
//~ rjf: Memory Functions
inline MD_B32
md_memory_is_zero(void* ptr, MD_U64 size)
{
MD_B32 result = 1;
// break down size
MD_U64 extra = (size & 0x7);
MD_U64 count8 = (size >> 3);
// check with 8-byte stride
MD_U64* p64 = (MD_U64*)ptr;
if (result)
{
for (MD_U64 i = 0; i < count8; i += 1, p64 += 1) {
if (*p64 != 0){
result = 0;
goto done;
}
}
}
// check extra
if (result)
{
MD_U8* p8 = (MD_U8*)p64;
for (MD_U64 i = 0; i < extra; i += 1, p8 += 1) {
if (*p8 != 0) {
result = 0;
goto done;
}
}
}
done:;
return(result);
}
inline
void* md_mem_move( void* destination, void const* source, MD_SSIZE byte_count )
{
if ( destination == NULL )
{
return NULL;
}
MD_U8* dest_ptr = md_rcast( MD_U8*, destination);
MD_U8 const* src_ptr = md_rcast( MD_U8 const*, source);
if ( dest_ptr == src_ptr )
return dest_ptr;
// NOTE: Non-overlapping
if ( src_ptr + byte_count <= dest_ptr || dest_ptr + byte_count <= src_ptr ) {
return md_memory_copy( dest_ptr, src_ptr, byte_count );
}
if ( dest_ptr < src_ptr )
{
if ( md_scast(MD_UPTR, src_ptr) % size_of( MD_SSIZE ) == md_scast(MD_UPTR, dest_ptr) % size_of( MD_SSIZE ) )
{
while ( md_pcast( MD_UPTR, dest_ptr) % size_of( MD_SSIZE ) )
{
if ( ! byte_count-- )
return destination;
*dest_ptr++ = *src_ptr++;
}
while ( byte_count >= size_of( MD_SSIZE ) )
{
* md_rcast(MD_SSIZE*, dest_ptr) = * md_rcast(MD_SSIZE const*, src_ptr);
byte_count -= size_of( MD_SSIZE );
dest_ptr += size_of( MD_SSIZE );
src_ptr += size_of( MD_SSIZE );
}
}
for ( ; byte_count; byte_count-- )
*dest_ptr++ = *src_ptr++;
}
else
{
if ( ( md_scast(MD_UPTR, src_ptr) % size_of( MD_SSIZE ) ) == ( md_scast(MD_UPTR, dest_ptr) % size_of( MD_SSIZE ) ) )
{
while ( md_scast(MD_UPTR, dest_ptr + byte_count ) % size_of( MD_SSIZE ) )
{
if ( ! byte_count-- )
return destination;
dest_ptr[ byte_count ] = src_ptr[ byte_count ];
}
while ( byte_count >= size_of( MD_SSIZE ) )
{
byte_count -= size_of( MD_SSIZE );
* md_rcast(MD_SSIZE*, dest_ptr + byte_count ) = * md_rcast( MD_SSIZE const*, src_ptr + byte_count );
}
}
while ( byte_count )
byte_count--, dest_ptr[ byte_count ] = src_ptr[ byte_count ];
}
return destination;
}
inline
void* md_mem_set( void* destination, MD_U8 fill_byte, MD_SSIZE byte_count )
{
if ( destination == NULL )
{
return NULL;
}
MD_SSIZE align_offset;
MD_U8* dest_ptr = md_rcast( MD_U8*, destination);
MD_U32 fill_word = ( ( MD_U32 )-1 ) / 255 * fill_byte;
if ( byte_count == 0 )
return destination;
dest_ptr[ 0 ] = dest_ptr[ byte_count - 1 ] = fill_byte;
if ( byte_count < 3 )
return destination;
dest_ptr[ 1 ] = dest_ptr[ byte_count - 2 ] = fill_byte;
dest_ptr[ 2 ] = dest_ptr[ byte_count - 3 ] = fill_byte;
if ( byte_count < 7 )
return destination;
dest_ptr[ 3 ] = dest_ptr[ byte_count - 4 ] = fill_byte;
if ( byte_count < 9 )
return destination;
align_offset = -md_scast(MD_SPTR, dest_ptr ) & 3;
dest_ptr += align_offset;
byte_count -= align_offset;
byte_count &= -4;
* md_rcast( MD_U32*, ( dest_ptr + 0 ) ) = fill_word;
* md_rcast( MD_U32*, ( dest_ptr + byte_count - 4 ) ) = fill_word;
if ( byte_count < 9 )
return destination;
* md_rcast( MD_U32*, dest_ptr + 4 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + 8 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 12 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 8 ) = fill_word;
if ( byte_count < 25 )
return destination;
* md_rcast( MD_U32*, dest_ptr + 12 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + 16 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + 20 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + 24 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 28 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 24 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 20 ) = fill_word;
* md_rcast( MD_U32*, dest_ptr + byte_count - 16 ) = fill_word;
align_offset = 24 + md_scast(MD_UPTR, dest_ptr ) & 4;
dest_ptr += align_offset;
byte_count -= align_offset;
{
MD_U64 fill_doubleword = ( md_scast( MD_U64, fill_word) << 32 ) | fill_word;
while ( byte_count > 31 )
{
* md_rcast( MD_U64*, dest_ptr + 0 ) = fill_doubleword;
* md_rcast( MD_U64*, dest_ptr + 8 ) = fill_doubleword;
* md_rcast( MD_U64*, dest_ptr + 16 ) = fill_doubleword;
* md_rcast( MD_U64*, dest_ptr + 24 ) = fill_doubleword;
byte_count -= 32;
dest_ptr += 32;
}
}
return destination;
}
////////////////////////////////
//~ rjf: Atomic Operations
#ifndef md_ins_atomic_u64_eval
# if MD_OS_WINDOWS
# if MD_ARCH_X64
# define md_ins_atomic_u64_eval(x) InterlockedAdd64((volatile __int64 *)(x), 0)
# define md_ins_atomic_u64_inc_eval(x) InterlockedIncrement64((volatile __int64 *)(x))
# define md_ins_atomic_u64_dec_eval(x) InterlockedDecrement64((volatile __int64 *)(x))
# define md_ins_atomic_u64_eval_assign(x,c) InterlockedExchange64((volatile __int64 *)(x), (c))
# define md_ins_atomic_u64_add_eval(x,c) InterlockedAdd64((volatile __int64 *)(x), c)
# define md_ins_atomic_u64_eval_cond_assign(x,k,c) InterlockedCompareExchange64((volatile __int64 *)(x), (k), (c))
# define md_ins_atomic_u32_eval(x,c) InterlockedAdd((volatile LONG *)(x), 0)
# define md_ins_atomic_u32_eval_assign(x,c) InterlockedExchange((volatile LONG *)(x), (c))
# define md_ins_atomic_u32_eval_cond_assign(x,k,c) InterlockedCompareExchange((volatile LONG *)(x), (k), (c))
# define md_ins_atomic_ptr_eval_assign(x,c) (void*) md_ins_atomic_u64_eval_assign((volatile __int64 *)(x), (__int64)(c))
# else
# error Atomic intrinsics not defined for this operating system / architecture combination.
# endif
# elif MD_OS_LINUX
# if MD_ARCH_X64
# define md_ins_atomic_u64_inc_eval(x) __sync_fetch_and_add((volatile MD_U64 *)(x), 1)
# else
# error Atomic intrinsics not defined for this operating system / architecture combination.
# endif
# else
# error Atomic intrinsics not defined for this operating system.
# endif
#endif
////////////////////////////////
//~ rjf: Linked List Building Macros
//- rjf: linked list macro helpers
#ifndef md_check_nil
#define md_check_nil(nil, p) ((p) == 0 || (p) == nil)
#endif
#ifndef md_set_nil
#define md_set_nil(nil, p) ((p) = nil)
#endif
//- rjf: doubly-linked-lists
#ifndef MD_LINKED_LIST_PURE_MACRO
#define MD_LINKED_LIST_PURE_MACRO 0
#endif
#ifndef md_dll_insert_npz
// TODO(Ed): Review...
inline void
md_dll__insert_npz(
void* nil,
void** f, void** f_prev,
void** l, void** l_next,
void* p, void** p_next, void** p_next_prev,
void* n, void** n_prev, void** n_next
)
{
if (md_check_nil(nil, *f)) {
*f = n;
*l = n;
*n_prev = nil;
*n_next = nil;
}
else
{
if (md_check_nil(nil, p)) {
*n_next = *f;
*f_prev = n;
*f = n;
*n_prev = nil;
}
else
{
if (p == *l) {
*l_next = n;
*n_prev = *l;
*l = n;
*n_next = nil;
}
else
{
if ( ! md_check_nil(nil, p) && md_check_nil(nil, *p_next)) {
*p_next_prev = n;
}
*n_next = *p_next;
*p_next = n;
*n_prev = p;
}
}
}
}
#if ! MD_LINKED_LIST_PURE_MACRO
// insert next-previous with nil
#define md_dll_insert_npz(nil, f, l, p, n, next, prev) md_dll__insert_npz(nil, &f, &f->prev, &l, &l->next, p, &p->next, &p->next->prev, n, &n->prev, &n->next)
#else
// insert next-previous with nil
#define md_dll_insert_npz(nil, f, l, p, n, next, prev) \
( \
md_check_nil(nil, f) ? ( \
(f) = (l) = (n), \
md_set_nil(nil, (n)->next), \
md_set_nil(nil, (n)->prev) \
) \
: ( \
md_check_nil(nil, p) ? ( \
(n)->next = (f), \
(f)->prev = (n), \
(f) = (n), \
md_set_nil(nil,(n)->prev) \
) \
: ((p) == (l)) ? ( \
(l)->next = (n), \
(n)->prev = (l), \
(l) = (n), \
md_set_nil(nil, (n)->next) \
) \
: ( \
( \
( ! md_check_nil(nil, p) && md_check_nil(nil, (p)->next) ) ? \
(0) \
: ( (p)->next->prev = (n) ) \
), \
((n)->next = (p)->next), \
((p)->next = (n)), \
((n)->prev = (p)) \
) \
) \
)
// ! MD_LINKED_LIST_PURE_MACRO
#endif
// md_dll_insert_npz
#endif
#ifndef md_dll_push_back_npz
// push-back next-previous with nil
#define md_dll_push_back_npz(nil, f, l, n, next, prev) md_dll_insert_npz(nil, f, l, l, n, next, prev)
#endif
#ifndef md_dll_push_front_npz
// push-fornt next-previous with nil
#define md_dll_push_front_npz(nil, f, l, n, next, prev) md_dll_insert_npz(nil, l, f, f, n, prev, next)
#endif
#ifndef md_dll_remove_npz
inline void
md_dll__remove_npz(
void* nil,
void** f,
void** l, void* l_prev,
void* n, void* n_next, void** n_next_prev,
void* n_prev, void** n_prev_next
)
{
if (n == *f) {
*f = n_next;
}
if (n == *l) {
*l = l_prev;
}
if (md_check_nil(nil, n_prev)) {
*n_prev_next = n_next;
}
if (! md_check_nil(nil, n_next)) {
*n_next_prev = n_prev;
}
}
#if ! MD_LINKED_LIST_PURE_MACRO
// remove next-previous with nil
#define md_dll_remove_npz(nil, f, l, n, next, prev) md_dll__remove_npz(nil, &f, &l, l->prev, n, n->next, &n->next->prev, n->prev, &n->prev->next)
#else
// remove next-previous with nil
#define md_dll_remove_npz(nil, f, l, n, next, prev) \
( \
( \
(n) == (f) ? \
(f) = (n)->next \
: (0) \
), \
( \
(n) == (l) ? \
(l) = (l)->prev \
: (0) \
), \
( \
md_check_nil(nil,(n)->prev) ? \
(0) \
: ((n)->prev->next = (n)->next) \
), \
( \
md_check_nil(nil,(n)->next) ? \
(0) \
: ((n)->next->prev = (n)->prev) \
) \
)
// ! MD_LINKED_LIST_PURE_MACRO
#endif
// md_dll_remove_npz
#endif
//- rjf: singly-linked, doubly-headed lists (queues)
#ifndef md_sll_queue_push_nz
inline void
md_sll__queue_push_nz(
void* nil,
void** f,
void** l, void** l_next,
void* n, void** n_next
)
{
if (md_check_nil(nil, *f)) {
*f = n;
*l = n;
*n_next = nil;
}
else {
*l_next = n;
*l = n;
*n_next = nil;
}
}
// queue-push next with nil
#if ! MD_LINKED_LIST_PURE_MACRO
#define md_sll_queue_push_nz(nil, f, l, n, next) md_sll__queue_push_nz(nil, &f, &l, &l->next, n, &n->next)
#else
#define md_sll_queue_push_nz(nil, f, l, n, next) \
( \
md_check_nil(nil, f) ? ( \
(f) = (l) = (n), \
md_set_nil(nil, (n)->next) \
) \
: ( \
(l)->next=(n), \
(l) = (n), \
md_set_nil(nil,(n)->next) \
) \
)
// ! MD_LINKED_LIST_PURE_MACRO
#endif
// md_sll_queue_push_nz
#endif
#ifndef md_sll_queue_push_front_nz
inline void
md_sll__queue_push_front_nz(void* nil, void** f, void** l, void* n, void** n_next) {
if (md_check_nil(nil, *f)) {
*f = n;
*l = n;
*n_next = nil;
}
else {
*n_next = f;
*f = n;
}
}
// queue-push-front next with nil
#if ! MD_LINKED_LIST_PURE_MACRO
#define md_sll_queue_push_front_nz(nil, f, l, n, next) md_sll__queue_push_front_nz(nil, &f, &l, n, &n->next)
#else
#define md_sll_queue_push_front_nz(nil, f, l, n, next) \
( \
md_check_nil(nil, f) ? ( \
(f) = (l) = (n), \
md_set_nil(nil,(n)->next) \
) \
: ( \
(n)->next = (f), \
(f) = (n) \
) \
)
// ! MD_LINKED_LIST_PURE_MACRO
#endif
#endif
#ifndef md_sll_queue_pop_nz
inline void
md_sll__queue_pop_nz(void* nil, void** f, void* f_next, void** l)
{
if (*f == *l) {
*f = nil;
*l = nil;
}
else {
*f = f_next;
}
}
// queue-pop next with nil
#if ! MD_LINKED_LIST_PURE_MACRO
#define md_sll_queue_pop_nz(nil, f, l, next) md_sll__queue_pop_nz(nil, &f, f->next, &l)
#else
#define md_sll_queue_pop_nz(nil, f, l, next) \
( \
(f) == (l) ? ( \
md_set_nil(nil,f), \
md_set_nil(nil,l) \
) \
: ( \
(f)=(f)->next \
) \
)
// ! MD_LINKED_LIST_PURE_MACRO
#endif
// md_sll_queue_pop_nz
#endif
//- rjf: singly-linked, singly-headed lists (stacks)
#ifndef md_sll_stack_push_n
#define md_sll_stack_push_n(f,n,next) ( (n)->next = (f), (f) = (n) )
#endif
#ifndef md_sll_stack_pop_n
#define md_sll_stack_pop_n(f,next) ( (f) = (f)->next )
#endif
//- rjf: doubly-linked-list helpers
#ifndef md_dll_insert_np
#define md_dll_insert_np(f, l, p, n, next, prev) md_dll_insert_npz (0, f, l, p, n, next, prev)
#endif
#ifndef md_dll_push_back_np
#define md_dll_push_back_np(f, l, n, next, prev) md_dll_push_back_npz (0, f, l, n, next, prev)
#endif
#ifndef md_dll_push_front_np
#define md_dll_push_front_np(f, l, n, next, prev) md_dll_push_front_npz(0, f, l, n, next, prev)
#endif
#ifndef md_dll_remove_np
#define md_dll_remove_np(f, l, n, next, prev) md_dll_remove_npz (0, f, l, n, next, prev)
#endif
#ifndef md_dll_insert
#define md_dll_insert(f, l, p, n) md_dll_insert_npz (0, f, l, p, n, next, prev)
#endif
#ifndef md_dll_push_back
#define md_dll_push_back(f, l, n) md_dll_push_back_npz (0, f, l, n, next, prev)
#endif
#ifndef md_dll_push_front
#define md_dll_push_front(f, l, n) md_dll_push_front_npz(0, f, l, n, next, prev)
#endif
#ifndef md_dll_remove
#define md_dll_remove(f, l, n) md_dll_remove_npz (0, f, l, n, next, prev)
#endif
//- rjf: singly-linked, doubly-headed list helpers
#ifndef md_sll_queue_push_n
#define md_sll_queue_push_n(f, l, n, next) md_sll_queue_push_nz (0, f, l, n, next)
#endif
#ifndef md_sll_queue_push_front_n
#define md_sll_queue_push_front_n(f, l, n, next) md_sll_queue_push_front_nz(0, f, l, n, next)
#endif
#ifndef md_sll_queue_pop_n
#define md_sll_queue_pop_n(f, l, next) md_sll_queue_pop_nzs (0, f, l, next)
#endif
#ifndef md_sll_queue_push
#define md_sll_queue_push(f, l, n) md_sll_queue_push_nz (0, f, l, n, next)
#endif
#ifndef md_sll_queue_push_front
#define md_sll_queue_push_front(f, l ,n) md_sll_queue_push_front_nz(0, f, l, n, next)
#endif
#ifndef md_sll_queue_pop
#define md_sll_queue_pop(f, l) md_sll_queue_pop_nz (0, f, l, next)
#endif
//- rjf: singly-linked, singly-headed list helpers
#ifndef md_sll_stack_push
#define md_sll_stack_push(f, n) md_sll_stack_push_n(f, n, next)
#endif
#ifndef md_sll_stack_pop
#define md_sll_stack_pop(f) md_sll_stack_pop_n (f, next)
#endif
////////////////////////////////
//~ rjf: Address Sanitizer Markup
#ifndef MD_NO_ASAN
# if MD_COMPILER_MSVC
# if defined(__SANITIZE_ADDRESS__)
# define MD_ASAN_ENABLED 1
# define MD_NO_ASAN __declspec(no_sanitize_address)
# else
# define MD_NO_ASAN
# endif
# elif MD_COMPILER_CLANG
# if defined(__has_feature)
# if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
# define MD_ASAN_ENABLED 1
# endif
# endif
# define MD_NO_ASAN __attribute__((no_sanitize("address")))
# else
# define MD_NO_ASAN
# endif
#endif
#ifndef md_asan_poison_memory_region
# if MD_ASAN_ENABLED
# pragma comment(lib, "clang_rt.asan-x86_64.lib")
MD_C_API void __asan_poison_memory_region(void const volatile *addr, size_t size);
MD_C_API void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
# define md_asan_poison_memory_region(addr, size) __asan_poison_memory_region((addr), (size))
# define md_asan_unpoison_memory_region(addr, size) __asan_unpoison_memory_region((addr), (size))
# else
# define md_asan_poison_memory_region(addr, size) ((void)(addr), (void)(size))
# define md_asan_unpoison_memory_region(addr, size) ((void)(addr), (void)(size))
# endif
#endif
////////////////////////////////
//~ rjf: Misc. Helper Macros
#ifndef md_array_count
#define md_array_count(a) (sizeof(a) / sizeof((a)[0]))
#endif
#ifndef md_ceil_integer_div
#define md_ceil_integer_div(a,b) (((a) + (b) - 1) / (b))
#endif
#ifndef md_swap
#define md_swap(T, a, b) do { T t__ = a; a = b; b = t__; } while(0)
#endif
#ifndef md_int_from_ptr
# if MD_ARCH_64BIT
# define md_int_from_ptr(ptr) ((MD_U64)(ptr))
# elif MD_ARCH_32BIT
# define md_int_from_ptr(ptr) ((MD_U32)(ptr))
# else
# error Missing pointer-to-integer cast for this architecture.
# endif
#endif
#ifndef md_ptr_from_int
#define md_ptr_from_int(i) (void*)((MD_U8*)0 + (i))
#endif
#ifndef md_compose_64bit
#define md_compose_64bit(a,b) ((((MD_U64)a) << 32) | ((MD_U64)b));
#endif
#ifndef md_align_pow2
#define md_align_pow2(x,b) (((x) + (b) - 1) & ( ~((b) - 1)))
#endif
#ifndef md_align_down_pow2
#define md_align_down_pow2(x,b) ((x) & (~((b) - 1)))
#endif
#ifndef md_align_pad_pow2
#define md_align_pad_pow2(x,b) ((0-(x)) & ((b) - 1))
#endif
#ifndef md_is_pow2
#define md_is_pow2(x) ((x) != 0 && ((x ) & ((x) - 1)) == 0)
#endif
#ifndef md_is_pow2_or_zero
#define md_is_pow2_or_zero(x) ((((x) - 1) & (x)) == 0)
#endif
#ifndef md_extract_bit
#define md_extract_bit(word, idx) (((word) >> (idx)) & 1)
#endif
#ifndef md_zero_struct
# if MD_LANG_CPP
# define md_zero_struct {}
# else
# define md_zero_struct {0}
# endif
#endif
#ifndef md_this_function_name
# if MD_COMPILER_MSVC && MD_COMPILER_MSVC_YEAR < 2015
# define md_this_function_name "unknown"
# else
# define md_this_function_name __func__
# endif
#endif
#ifndef md_read_only
# if MD_COMPILER_MSVC || (MD_COMPILER_CLANG && MD_OS_WINDOWS)
# pragma section(".rdata$", read)
# define md_read_only __declspec(allocate(".rdata$"))
# elif (MD_COMPILER_CLANG && MD_OS_LINUX)
# define md_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 md_read_only
# endif
#endif
#ifndef md_local_persist
#define md_local_persist static
#endif
#if MD_COMPILER_MSVC
# define md_thread_static __declspec(thread)
#elif MD_COMPILER_CLANG || MD_COMPILER_GCC
# define md_thread_static __thread
#endif
#if MD_COMPILER_CPP
// Already Defined
#elif MD_COMPILER_C && __STDC_VERSION__ >= 201112L
# define md_thread_local _Thread_local
#elif MD_COMPILER_MSVC
# define md_thread_local __declspec(thread)
#elif MD_COMPILER_CLANG
# define md_thread_local __thread
#else
# error "No thread local support"
#endif
////////////////////////////////
//~ rjf: Safe Casts
inline MD_U16
md_safe_cast_u16(MD_U32 x) {
md_assert_always(x <= MD_MAX_U16);
MD_U16 result = (MD_U16)x;
return result;
}
inline MD_U32
md_safe_cast_u32(MD_U64 x) {
md_assert_always(x <= MD_MAX_U32);
MD_U32 result = (MD_U32)x;
return result;
}
inline MD_S32
md_safe_cast_s32(MD_S64 x) {
md_assert_always(x <= MD_MAX_S32);
MD_S32 result = (MD_S32)x;
return result;
}
////////////////////////////////
//~ rjf: Large Base Type Functions
inline U128 md_u128_zero (void) { U128 v = {0}; return v; }
inline U128 md_u128_make (MD_U64 v0, MD_U64 v1) { U128 v = {v0, v1}; return v; }
inline MD_B32 md_u128_match(U128 a, U128 b) { return md_memory_match_struct(&a, &b); }
////////////////////////////////
//~ rjf: Bit Patterns
inline MD_U32 md_u32_from_u64_saturate(MD_U64 x) { MD_U32 x32 = (x > MD_MAX_U32) ? MD_MAX_U32 : (MD_U32)x; return(x32); }
inline MD_U64
md_u64_up_to_pow2(MD_U64 x) {
if (x == 0) {
x = 1;
}
else {
x -= 1;
x |= (x >> 1);
x |= (x >> 2);
x |= (x >> 4);
x |= (x >> 8);
x |= (x >> 16);
x |= (x >> 32);
x += 1;
}
return(x);
}
inline MD_S32
md_extend_sign32(MD_U32 x, MD_U32 size) {
MD_U32 high_bit = size * 8;
MD_U32 shift = 32 - high_bit;
MD_S32 result = ((MD_S32)x << shift) >> shift;
return result;
}
inline MD_S64
md_extend_sign64(MD_U64 x, MD_U64 size) {
MD_U64 high_bit = size * 8;
MD_U64 shift = 64 - high_bit;
MD_S64 result = ((MD_S64)x << shift) >> shift;
return result;
}
inline MD_F32 md_inf32 (void) { union { MD_U32 u; MD_F32 f; } x; x.u = MD_EXPONENT32; return(x.f); }
inline MD_F32 md_neg_inf32(void) { union { MD_U32 u; MD_F32 f; } x; x.u = MD_SIGN32 | MD_EXPONENT32; return(x.f); }
inline MD_U16
md_bswap_u16(MD_U16 x)
{
MD_U16 result = (((x & 0xFF00) >> 8) |
((x & 0x00FF) << 8));
return result;
}
inline MD_U32
md_bswap_u32(MD_U32 x)
{
MD_U32 result = (((x & 0xFF000000) >> 24) |
((x & 0x00FF0000) >> 8) |
((x & 0x0000FF00) << 8) |
((x & 0x000000FF) << 24));
return result;
}
inline MD_U64
md_bswap_u64(MD_U64 x)
{
// TODO(nick): naive bswap, replace with something that is faster like an intrinsic
MD_U64 result = (((x & 0xFF00000000000000ULL) >> 56) |
((x & 0x00FF000000000000ULL) >> 40) |
((x & 0x0000FF0000000000ULL) >> 24) |
((x & 0x000000FF00000000ULL) >> 8) |
((x & 0x00000000FF000000ULL) << 8) |
((x & 0x0000000000FF0000ULL) << 24) |
((x & 0x000000000000FF00ULL) << 40) |
((x & 0x00000000000000FFULL) << 56));
return result;
}
#if MD_ARCH_LITTLE_ENDIAN
# define md_from_be_u16(x) md_bswap_u16(x)
# define md_from_be_u32(x) md_bswap_u32(x)
# define md_from_be_u64(x) md_bswap_u64(x)
#else
# define md_from_be_u16(x) (x)
# define md_from_be_u32(x) (x)
# define md_from_be_u64(x) (x)
#endif
#if MD_COMPILER_MSVC || (MD_COMPILER_CLANG && MD_OS_WINDOWS)
inline MD_U64 md_count_bits_set16(MD_U16 val) { return __popcnt16(val); }
inline MD_U64 md_count_bits_set32(MD_U32 val) { return __popcnt (val); }
inline MD_U64 md_count_bits_set64(MD_U64 val) { return __popcnt64(val); }
inline MD_U64 md_ctz32(MD_U32 mask) { unsigned long idx; _BitScanForward (&idx, mask); return idx; }
inline MD_U64 md_ctz64(MD_U64 mask) { unsigned long idx; _BitScanForward64(&idx, mask); return idx; }
inline MD_U64 md_clz32(MD_U32 mask) { unsigned long idx; _BitScanReverse (&idx, mask); return 31 - idx; }
inline MD_U64 md_clz64(MD_U64 mask) { unsigned long idx; _BitScanReverse64(&idx, mask); return 63 - idx; }
#elif MD_COMPILER_CLANG || MD_COMPILER_GCC
inline MD_U64 md_count_bits_set16(MD_U16 val) { NotImplemented; return 0; }
inline MD_U64 md_count_bits_set32(MD_U32 val) { NotImplemented; return 0; }
inline MD_U64 md_count_bits_set64(MD_U64 val) { NotImplemented; return 0; }
inline MD_U64 md_ctz32(MD_U32 val) { NotImplemented; return 0; }
inline MD_U64 md_ctz64(MD_U32 val) { NotImplemented; return 0; }
inline MD_U64 md_clz32(MD_U32 val) { NotImplemented; return 0; }
inline MD_U64 md_clz64(MD_U64 val) { NotImplemented; return 0; }
#else
# error "Bit intrinsic functions not defined for this compiler."
#endif
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