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ci2 memory

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Randy Jordan
2026-06-16 12:20:30 -05:00
parent 5c87e78d0f
commit 21ce80de86
5 changed files with 320 additions and 0 deletions
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include/ci2.h
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@@ -25,4 +25,8 @@ SOFTWARE.
#include "./platform/ci2_platform.h" #include "./platform/ci2_platform.h"
#include "./platform/error/ci2_exception.h" #include "./platform/error/ci2_exception.h"
#include "./platform/mem/ci2_arena.h"
#include "./platform/mem/ci2_mem.h"
#endif // ci2.h #endif // ci2.h
include/platform/mem/ci2_arena.h
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/* - | Copyright | ------------------------------------------------------------
Copyright (c) 2026 Randy Jordan
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* --------------------------------------------------------------------------*/
#ifndef CI2_ARENA_H
#define CI2_ARENA_H
#include "../ci2_platform.h"
#include <stddef.h>
struct CI2_Arena
{
char* beg;
char* end;
};
typedef struct CI2_Arena CI2_Arena;
/* Initialize an Arena with an existing buffer */
CI2_DEF void
ci2_arena_back(struct CI2_Arena* a, char* buf, ptrdiff_t len);
/* Allocate a new Arena */
CI2_DEF struct CI2_Arena
ci2_arena_new(ptrdiff_t cap);
/* Get the current capacity of an Arena */
CI2_DEF ptrdiff_t
ci2_arena_capacity(struct CI2_Arena a);
/* Make an allocation from an Arena and do not zero.*/
CI2_DEF void*
ci2_arena_malloc(struct CI2_Arena* a,
ptrdiff_t size,
ptrdiff_t align,
ptrdiff_t count);
/* Make an allocation from an Arena and zero.*/
CI2_DEF void*
ci2_arena_calloc(struct CI2_Arena* a,
ptrdiff_t size,
ptrdiff_t align,
ptrdiff_t count);
#endif // ci2_arena.h
include/platform/mem/ci2_mem.h
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/* - | Copyright | ------------------------------------------------------------
Copyright (c) 2026 Randy Jordan
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* --------------------------------------------------------------------------*/
#ifndef CI2_MEM_H
#define CI2_MEM_H
#include "../error/ci2_exception.h"
#include <stddef.h>
/* Out of memory exception forward declaration. */
CI2_DEF const struct Exception oom;
/* Allocate an object and do not zero. May throw exception. */
CI2_DEF void*
ci2_try_malloc(size_t nbytes, const char* file, const char* func, int line);
/* Allocate an object and zero ci2ory. May throw exception. */
CI2_DEF void*
ci2_try_calloc(size_t count,
size_t nbytes,
const char* file,
const char* func,
int line);
/* Free and null a pointer */
CI2_DEF void
ci2_free(void** ptr, const char* file, const char* func, int line);
/* Resize a non-null pointer */
CI2_DEF void*
ci2_try_resize(void* ptr,
size_t nbytes,
const char* file,
const char* func,
int line);
#define CI2_MALLOC(nbytes) \
ci2_try_malloc((nbytes), __FILE__, CI2_FUNC, __LINE__)
#define CI2_CALLOC(count, nbytes) \
ci2_try_calloc((count), (nbytes), __FILE__, CI2_FUNC, __LINE__)
#define CI2_NEW(p) ((p) = CI2_MALLOC((size_t)sizeof *(p)))
#define CI2_NEW0(p) ((p) = CI2_CALLOC(1, (size_t)sizeof *(p)))
#define CI2_FREE(ptr) \
((void)(ci2_free((ptr), __FILE__, CI2_FUNC, __LINE__), (ptr) = 0))
#define CI2_RESIZE(ptr, nbytes) \
((ptr) = ci2_try_resize((ptr), (nbytes), __FILE__, CI2_FUNC, __LINE__))
#endif // ci2_mem.h
src/ci2_arena.c
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@@ -0,0 +1,89 @@
/* - | Copyright | ------------------------------------------------------------
Copyright (c) 2026 Randy Jordan
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* --------------------------------------------------------------------------*/
#include "../include/platform/mem/ci2_arena.h"
#include <stdlib.h>
#include <string.h>
/* Initialize an Arena with an existing buffer */
void
ci2_arena_back(struct CI2_Arena* a, char* buf, ptrdiff_t len)
{
CI2_ASSERT(a != NULL);
CI2_ASSERT(buf != NULL);
a->beg = buf;
a->end = buf + len;
}
/* Allocate a new Arena */
struct CI2_Arena
ci2_arena_new(ptrdiff_t cap)
{
struct CI2_Arena a = { 0 };
a.beg = malloc(cap);
a.end = a.beg ? a.beg + cap : 0;
return a;
}
/* Get the current capacity of an Arena */
ptrdiff_t
ci2_arena_capacity(struct CI2_Arena a)
{
ptrdiff_t res = a.end - a.beg;
return res;
}
/* Make an allocation from an Arena and do not zero.*/
void*
ci2_arena_calloc(struct CI2_Arena* a,
ptrdiff_t size,
ptrdiff_t align,
ptrdiff_t count)
{
ptrdiff_t padding = -(uintptr_t)a->beg & (align - 1);
ptrdiff_t available = a->end - a->beg - padding;
if (available < 0 || count > available / size) {
return NULL;
}
ptrdiff_t total = padding + count * size;
void* p = a->beg + total;
a->beg += total;
return memset(p, 0, total);
}
/* Make an allocation from an Arena and zero.*/
void*
ci2_arena_malloc(struct CI2_Arena* a,
ptrdiff_t size,
ptrdiff_t align,
ptrdiff_t count)
{
ptrdiff_t padding = -(uintptr_t)a->beg & (align - 1);
ptrdiff_t available = a->end - a->beg - padding;
if (available < 0 || count > available / size) {
return NULL;
}
ptrdiff_t total = padding + count * size;
void* p = a->beg + total;
a->beg += total;
return p;
}
src/ci2_mem.c
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/* - | Copyright | ------------------------------------------------------------
Copyright (c) 2026 Randy Jordan
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
* --------------------------------------------------------------------------*/
#include "../include/platform/mem/ci2_mem.h"
#include <stdlib.h>
const struct Exception oom = { "Out of Memory!" };
void*
ci2_try_malloc(size_t nbytes, const char* file, const char* func, int line)
{
void* ptr;
CI2_ASSERT(nbytes > 0);
ptr = malloc(nbytes);
if (ptr == NULL) {
if (file == NULL)
CI2_RAISE(oom);
else
ci2_raise_exception(&oom, file, func, line);
}
return ptr;
}
void*
ci2_try_calloc(size_t count,
size_t nbytes,
const char* file,
const char* func,
int line)
{
void* ptr;
CI2_ASSERT(count > 0);
CI2_ASSERT(nbytes > 0);
ptr = calloc(count, nbytes);
if (ptr == NULL) {
if (file == NULL)
CI2_RAISE(oom);
else
ci2_raise_exception(&oom, file, func, line);
}
return ptr;
}
void
ci2_free(void** ptr, const char* file, const char* func, int line)
{
UNUSED(file);
UNUSED(func);
UNUSED(line);
if (ptr && *ptr) {
free(*ptr);
*ptr = NULL;
}
}
void*
ci2_try_resize(void* ptr,
size_t nbytes,
const char* file,
const char* func,
int line)
{
CI2_ASSERT(ptr != NULL);
CI2_ASSERT(nbytes > 0);
void* temp = realloc(ptr, nbytes);
if (temp == NULL) {
if (file == NULL)
CI2_RAISE(oom);
else
ci2_raise_exception(&oom, file, func, line);
}
ptr = temp;
return ptr;
}