gora/arena.h
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v1.0.1 - Prevent name mangling of functions; don't reset region_capacity in arena_free()

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seajee
2025-08-02 15:13:38 +02:00
parent e583d87285
commit 4c069c0945
2 changed files with 26 additions and 6 deletions
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2
README.md
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@@ -18,7 +18,7 @@ int main(void)
int *x = arena_alloc(&a, sizeof(*x) * 32); int *x = arena_alloc(&a, sizeof(*x) * 32);
float *y = arena_alloc(&a, sizeof(*y) * 512); float *y = arena_alloc(&a, sizeof(*y) * 512);
arena_free(&a); arena_free(&a); // The arena can still be reused
return 0; return 0;
} }
``` ```

30
arena.h
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@@ -1,4 +1,4 @@
// arena.h - v1.0.0 - MIT License - https://github.com/seajee/arena.h // arena.h - v1.0.1 - MIT License - https://github.com/seajee/arena.h
// single header library for region-based memory management. // single header library for region-based memory management.
// //
// License and changelog: // License and changelog:
@@ -8,7 +8,7 @@
// Compile-time options: // Compile-time options:
// //
// Note: every compile-time option listed here should be configured before // Note: every compile-time option listed here should be configured before
// the definition of the ARENA_IMPLEMENTATION macro. // the #include "arena.h"
// //
// #define ARENA_REGION_CAPACITY new_region_capacity_in_bytes (4096) // #define ARENA_REGION_CAPACITY new_region_capacity_in_bytes (4096)
// //
@@ -48,7 +48,9 @@
// void arena_free(Arena *a) // void arena_free(Arena *a)
// //
// This function frees all of the regions allocated in the specified arena // This function frees all of the regions allocated in the specified arena
// which invalidates all the pointers associated with the arena. // which invalidates all the pointers associated with the arena. The arena can
// still be reused. If the arena was created with arena_create() the
// configured region_capacity will be retained.
// //
// void arena_reset(Arena *a) // void arena_reset(Arena *a)
// //
@@ -70,7 +72,7 @@ int main(void)
int *x = arena_alloc(&a, sizeof(*x) * 32); int *x = arena_alloc(&a, sizeof(*x) * 32);
float *y = arena_alloc(&a, sizeof(*y) * 512); float *y = arena_alloc(&a, sizeof(*y) * 512);
arena_free(&a); arena_free(&a); // The arena can still be reused
return 0; return 0;
} }
*/ */
@@ -100,6 +102,10 @@ int main(void)
# define ARENA_FREE free # define ARENA_FREE free
#endif // ARENA_FREE #endif // ARENA_FREE
#ifdef __cplusplus
extern "C" { // Prevent name mangling of functions
#endif // __cplusplus
typedef struct Arena_Region Arena_Region; typedef struct Arena_Region Arena_Region;
struct Arena_Region { struct Arena_Region {
@@ -120,10 +126,18 @@ void *arena_alloc(Arena *a, size_t bytes);
void arena_free(Arena *a); void arena_free(Arena *a);
void arena_reset(Arena *a); void arena_reset(Arena *a);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // ARENA_H_ #endif // ARENA_H_
#ifdef ARENA_IMPLEMENTATION #ifdef ARENA_IMPLEMENTATION
#ifdef __cplusplus
extern "C" { // Prevent name mangling of functions
#endif // __cplusplus
Arena arena_create(size_t region_capacity) Arena arena_create(size_t region_capacity)
{ {
Arena a = {0}; Arena a = {0};
@@ -195,7 +209,7 @@ void arena_free(Arena *a)
a->head = NULL; a->head = NULL;
a->tail = NULL; a->tail = NULL;
a->region_capacity = 0; // a->region_capacity = 0;
} }
void arena_reset(Arena *a) void arena_reset(Arena *a)
@@ -211,11 +225,17 @@ void arena_reset(Arena *a)
a->tail = a->head; a->tail = a->head;
} }
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // ARENA_IMPLEMENTATION #endif // ARENA_IMPLEMENTATION
/* /*
* Revision history: * Revision history:
* *
* 1.0.1 (2025-08-02) Prevent name mangling of functions; don't reset
* region_capacity in arena_free()
* 1.0.0 (2025-07-24) Initial release * 1.0.0 (2025-07-24) Initial release
*/ */