-#ifndef VG_MEM_H
-#define VG_MEM_H
-
-#include "vg.h"
-#include "vg_stdint.h"
-#include "vg_platform.h"
-#include "vg_log.h"
-
-#include <stdlib.h>
-#include <malloc.h>
-
-static void vg_print_backtrace(void);
+#pragma once
#define VG_MAX_ALLOCATIONS 128
-#define VG_FUZZ_ALLOCATIONS
typedef struct vg_linear_allocator vg_linear_allocator;
typedef struct vg_allocation_meta vg_allocation_meta;
-struct{
+struct vg_global_mem
+{
void *rtmemory,
*scratch;
int use_libc_malloc;
u32 quota;
}
-static vg_mem;
+extern vg_mem;
struct vg_allocation_meta
{
#define VG_MEMORY_SYSTEM 0x1 /* systems memory, slow and low counts */
#define VG_MEMORY_REALTIME 0x2 /* per-frame. no max allocs, only size. fast */
-/* systems memory cannot be declared inside realtime memory regions */
-
/*
* Stored just behind the array. 32 bytes.
*/
u32 last_alloc_size;
void *last_alloc;
vg_allocation_meta *alloc_table;
-
-#ifdef _WIN32
- /* 32 bit pointers! */
- u8 padding[ 8 ];
-#endif
};
#pragma pack(pop)
-static u32 vg_align8( u32 s );
-static u32 vg_align4( u32 s );
+u32 vg_align8( u32 s );
+u32 vg_align4( u32 s );
/* allocate something from a linear allocator */
__attribute__((warn_unused_result))
-static void *_vg_linear_alloc( void *buffer, u32 size,
- const char *constr_name );
+void *_vg_linear_alloc( void *buffer, u32 size, const char *constr_name );
/* resize latest block of memory from linear */
__attribute__((warn_unused_result))
-static void *vg_linear_resize( void *buffer, void *data, u32 newsize );
+void *vg_linear_resize( void *buffer, void *data, u32 newsize );
/* its possible to delete just the last item */
-static void vg_linear_del( void *buffer, void *data );
+void vg_linear_del( void *buffer, void *data );
/* extend latest block of memory from linear */
__attribute__((warn_unused_result))
-static void *_vg_linear_extend( void *buffer, void *data, u32 extra,
- const char *constr_name );
+void *_vg_linear_extend( void *buffer, void *data, u32 extra,
+ const char *constr_name );
/* get the current usage of allocator */
-static u32 vg_linear_get_cur( void *buffer );
+u32 vg_linear_get_cur( void *buffer );
/* get the capacity of allocator. */
-static u32 vg_linear_get_capacity( void *buffer );
+u32 vg_linear_get_capacity( void *buffer );
/* get the remaining size of the allocator */
-static u32 vg_linear_remaining( void *buffer );
+u32 vg_linear_remaining( void *buffer );
/* yeet all memory from linear allocator */
-static void vg_linear_clear( void *buffer );
+void vg_linear_clear( void *buffer );
/* request all the memory we need in advance */
-static void vg_set_mem_quota( u32 size );
+void vg_set_mem_quota( u32 size );
/* essentially init() */
-static void vg_alloc_quota(void);
+void vg_alloc_quota(void);
/* print out tree of current memory used. only works with libc mode */
-static void vg_mem_log( void *lin_alloc, int depth, const char *name );
+void vg_mem_log( void *lin_alloc, int depth, const char *name );
#define VG_MEM_MCSTR(S) VG_MEM_MCSTR2(S)
#define VG_MEM_MCSTR2(S) #S
#define vg_create_linear_allocator(...) \
_vg_create_linear_allocator( __VA_ARGS__, __FILE__":"VG_MEM_MCSTR(__LINE__) )
-/* implementation
- * ----------------------------------------
- */
-
-static void vg_fatal_error( const char *fmt, ... );
-
-#if 0
-static void vg_error(const char *fmt, ...);
-static void vg_info(const char *fmt, ...);
-#endif
-
-static u32 vg_align8( u32 s )
-{
- u32 m = (s + 7) >> 3;
- return m << 3;
-}
-
-static u32 vg_align4( u32 s )
-{
- u32 m = (s + 3) >> 2;
- return m << 2;
-}
-
-/* Returns allocator structure from data pointer */
-static vg_linear_allocator *vg_linear_header( void *data )
-{
- vg_linear_allocator *ptr = data;
- ptr --;
-
- return ptr;
-}
-
-/* allocate something from a linear allocator */
-__attribute__((warn_unused_result))
-static void *_vg_linear_alloc( void *buffer, u32 size,
- const char *constr_name )
-{
- if( size % 8 ){
- vg_error( "alloc(%u) is not 8 byte aligned\n", size );
- vg_print_backtrace();
- size = vg_align8( size );
- }
- if( ((u64)buffer) % 8 ){
- vg_fatal_error( "unaligned buffer (%p)", buffer );
- }
-
- vg_linear_allocator *alloc = vg_linear_header( buffer );
-
- if( (alloc->cur + size) > alloc->size ){
- vg_fatal_error( "linear allocator overflow (%u + %u > %u)\n",
- alloc->cur, size, alloc->size );
- }
-
- if( alloc->flags & VG_MEMORY_SYSTEM )
- if( (alloc->allocation_count + 1) > VG_MAX_ALLOCATIONS )
- vg_fatal_error( "Max linear allocations reached" );
-
- void *data;
-
- if( vg_mem.use_libc_malloc && (alloc->flags & VG_MEMORY_SYSTEM) ){
- data = malloc( size );
-
- vg_allocation_meta *meta = &alloc->alloc_table[ alloc->allocation_count ];
- meta->type = k_allocation_type_block;
- meta->data = data;
- meta->size = size;
- meta->name = constr_name;
- }
- else{
- data = buffer + alloc->cur;
- }
-
- u8 *bytes = data;
- for( u32 i=0; i<size; i++ ){
- bytes[i] = 0xfe;
- }
-
- alloc->allocation_count ++;
- alloc->last_alloc = data;
- alloc->last_alloc_size = size;
- alloc->cur += size;
-
- if( ((u64)data) % 8 ){
- vg_fatal_error( "unaligned" );
- }
-
- return data;
-}
-
-/* resize latest block of memory from linear */
-__attribute__((warn_unused_result))
-static void *vg_linear_resize( void *buffer, void *data, u32 newsize )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
-
- if( newsize % 8 ){
- vg_error( "alloc(%u) is not 8 byte aligned\n", newsize );
- vg_print_backtrace();
- newsize = vg_align8( newsize );
- }
-
- if( alloc->last_alloc != data )
- vg_fatal_error( "This block has been fixed!" );
-
- if( (alloc->cur - alloc->last_alloc_size + newsize) > alloc->size )
- vg_fatal_error( "Cannot resize, overflow" );
-
- alloc->cur -= alloc->last_alloc_size;
- alloc->cur += newsize;
- alloc->last_alloc_size = newsize;
-
- if( vg_mem.use_libc_malloc && (alloc->flags & VG_MEMORY_SYSTEM) ){
- data = realloc( data, newsize );
- if( !data )
- vg_fatal_error( "realloc failed" );
-
- alloc->alloc_table[ alloc->allocation_count-1 ].data = data;
- alloc->last_alloc = data;
- return data;
- }
- else{
- return data;
- }
-}
-
-/* its possible to delete just the last item */
-static void vg_linear_del( void *buffer, void *data )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
-
- if( alloc->last_alloc != data ){
- vg_fatal_error( "This block has been fixed! Last alloc: %p, this: %p\n",
- alloc->last_alloc, data );
- }
-
- if( vg_mem.use_libc_malloc && (alloc->flags & VG_MEMORY_SYSTEM) ){
- vg_allocation_meta *meta = &alloc->alloc_table[alloc->allocation_count-1];
- if( meta->type == k_allocation_type_linear )
- vg_fatal_error( "Cannot free a linear allocator in this conext" );
-
- free( data );
- }
-
- alloc->allocation_count --;
- alloc->cur -= alloc->last_alloc_size;
- alloc->last_alloc = NULL;
- alloc->last_alloc_size = 0;
-}
-
-/* extend latest block of memory from linear */
-__attribute__((warn_unused_result))
-static void *_vg_linear_extend( void *buffer, void *data, u32 extra,
- const char *constr_name )
-{
- if( !data )
- return _vg_linear_alloc( buffer, vg_align8(extra), constr_name );
-
- vg_linear_allocator *alloc = vg_linear_header( buffer );
-
- if( alloc->last_alloc != data )
- vg_fatal_error( "This block has been fixed!" );
-
- u32 new_size = alloc->last_alloc_size + extra;
- return vg_linear_resize( buffer, data, vg_align8(new_size) );
-}
-
-/* get the current usage of allocator */
-static u32 vg_linear_get_cur( void *buffer )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
- return alloc->cur;
-}
-
-/* get the capacity of allocator. */
-static u32 vg_linear_get_capacity( void *buffer )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
- return alloc->size;
-}
-
-/* get the remaining size of the allocator */
-static u32 vg_linear_remaining( void *buffer )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
- return alloc->size - alloc->cur;
-}
-
-/* yeet all memory from linear allocator */
-static void vg_linear_clear( void *buffer )
-{
- vg_linear_allocator *alloc = vg_linear_header( buffer );
-
- /* libc mode we recursively free any allocations made */
- if( vg_mem.use_libc_malloc && (alloc->flags & VG_MEMORY_SYSTEM) ){
- for( u32 i=0; i<alloc->allocation_count; i++ ){
- vg_allocation_meta *meta = &alloc->alloc_table[i];
-
- if( meta->type == k_allocation_type_block ){
- free( meta->data );
- }
- else{
- vg_linear_clear( meta->data );
- vg_linear_allocator *sub = vg_linear_header( meta->data );
-
- free( sub->alloc_table );
- free( sub );
- }
- }
- }
-
- alloc->last_alloc = NULL;
- alloc->last_alloc_size = 0;
- alloc->allocation_count = 0;
- alloc->cur = 0;
-}
-
-/* allocate a FIXED SIZE linear allocator
- *
- * FIXME: there was a bug in vg's code that caused a race condition between
- * two system allocations. make this IMPOSSIBLE by requiring a lock
- * on the allocater to be passed between threads.
- *
- * luckily that bug only exists when using development tools, but still!
- *
- * this should then only be checked and turned on in debugging.
- *
- */
-static void *_vg_create_linear_allocator( void *lin_alloc, u32 size,
- u16 flags, const char *constr_name)
-{
- assert( sizeof( vg_linear_allocator ) == 32 );
-
- vg_linear_allocator *header;
- u32 block_size = size + sizeof(vg_linear_allocator);
-
- /* Creating it inside an existing one */
- if( lin_alloc ){
- vg_linear_allocator *alloc = vg_linear_header( lin_alloc );
-
- if( alloc->cur + block_size > alloc->size )
- vg_fatal_error( "Out of memory" );
-
- if( alloc->allocation_count + 1 > VG_MAX_ALLOCATIONS )
- vg_fatal_error( "Max allocations in linear allocator" );
-
- if( (flags && VG_MEMORY_SYSTEM) && (alloc->flags & VG_MEMORY_REALTIME) )
- vg_fatal_error( "Cannot declare realtime allocator inside systems"
- " allocator" );
-
- if( vg_mem.use_libc_malloc ){
- vg_allocation_meta *meta =
- &alloc->alloc_table[ alloc->allocation_count ];
-
- if( flags & VG_MEMORY_REALTIME )
- header = malloc( block_size );
- else
- header = malloc( sizeof(vg_linear_allocator) );
-
- meta->data = header+1;
- meta->type = k_allocation_type_linear;
- meta->size = size;
- meta->name = constr_name;
- }
- else{
- header = lin_alloc + alloc->cur;
- }
-
- alloc->cur += block_size;
- alloc->last_alloc = header;
- alloc->last_alloc_size = block_size;
- alloc->allocation_count ++;
- }
- else{
- if( vg_mem.use_libc_malloc && (flags & VG_MEMORY_SYSTEM) )
- header = malloc( sizeof(vg_linear_allocator) );
- else
- header = malloc( block_size );
- }
-
- header->allocation_count = 0;
- header->cur = 0;
- header->last_alloc = NULL;
- header->last_alloc_size = 0;
- header->size = size;
- header->flags = flags;
-
- if( vg_mem.use_libc_malloc && (flags & VG_MEMORY_SYSTEM) ){
- u32 table_size = sizeof(vg_allocation_meta)*VG_MAX_ALLOCATIONS;
- header->alloc_table = malloc( table_size );
- }
- else
- header->alloc_table = NULL;
-
- return header+1;
-}
-
-/* request all the memory we need in advance */
-static void vg_set_mem_quota( u32 size )
-{
- vg_mem.quota = size;
-}
-
-static void vg_alloc_quota(void)
-{
- u32 size_scratch = 10*1024*1024;
- u32 size = VG_MAX( vg_mem.quota, size_scratch );
-
- vg_mem.rtmemory = _vg_create_linear_allocator( NULL, size, VG_MEMORY_SYSTEM,
- "VG Root" );
- vg_mem.scratch = _vg_create_linear_allocator( vg_mem.rtmemory,
- size_scratch,
- VG_MEMORY_SYSTEM,
- "Scratch buffer" );
-}
-
-static void vg_mem_log( void *lin_alloc, int depth, const char *name )
-{
- if( vg_mem.use_libc_malloc ){
- vg_linear_allocator *alloc = vg_linear_header( lin_alloc );
-
- u32 s = alloc->size;
- f32 p = ((float)alloc->cur / (float)alloc->size) * 100.0f;
-
- for( int i=0; i<depth; i++ ) printf( " " );
- printf( "LA(%s): %u bytes, %f%% used\n", name, s, p );
-
- if( alloc->flags & VG_MEMORY_SYSTEM ){
- for( u32 i=0; i<alloc->allocation_count; i++ ){
- vg_allocation_meta *meta = &alloc->alloc_table[i];
-
- if( meta->type == k_allocation_type_block ){
- for( int i=0; i<depth+1; i++ ) printf( " " );
- printf( "B(%s): %u bytes\n", meta->name, meta->size );
- }
- else{
- vg_mem_log( meta->data, depth +1, meta->name );
- }
- }
- }
- else{
- for( int i=0; i<depth+1; i++ ) printf( " " );
- printf( "<opaque memory> (UNTRACKED)\n" );
- }
- }
- else{
- vg_error( "allocations are not tracked (turn on libc mode)\n" );
- }
-}
-
-#endif /* VG_MEM_H */
+void *_vg_create_linear_allocator( void *lin_alloc, u32 size,
+ u16 flags, const char *constr_name);
+vg_linear_allocator *vg_linear_header( void *data );
projects / vg.git / blobdiff