arena.h File Reference

Defines an arena allocator for the compiler. More...

#include "def.h"

Go to the source code of this file.

Data Structures
struct	ps_arena_allocator

Macros
#define	PS_INITIAL_ARENA_MMAP   0x2000000ULL
	An allocation of 16MB per arena.
#define	arena_alloc(arena, n)   ps_arena_allocate(arena, n)
#define	astalloc(n)   arena_alloc(PS_ARENA_AST, n)
#define	iralloc(n)   arena_alloc(PS_ARENA_IR, n)
#define	ast_strndup(str, len)   arena_strndup(PS_ARENA_AST, str, len)
#define	arena_sprintf(arena, fmt, ...)
#define	ast_sprintf(fmt, ...)   arena_sprintf(PS_ARENA_AST, fmt, __VA_ARGS__)

Enumerations
enum	ps_arena_domain { PS_ARENA_AST , PS_ARENA_IR , __PS_ARENA_COUNT }

Functions
void	ps_arena_open (enum ps_arena_domain domain)
	Initializes the given arena for allocation.
void	ps_arena_close (enum ps_arena_domain domain)
	Destroys any allocated objects in the given arena.
void *	ps_arena_allocate (enum ps_arena_domain domain, usize n)
	Allocates a new object in the given arena.
void *	ps_arena_allocate_debug (enum ps_arena_domain domain, usize n, const char *file, const char *func, usize line)
char *	arena_strndup (enum ps_arena_domain arena, STR str, usize length)
	Duplicates the specified string and produces a null-terminated arena-allocated copy.

Detailed Description

Defines an arena allocator for the compiler.

Copyright

Copyright (C) 2021 Ethan Uppal. All rights reserved.

Author

Ethan Uppal

Definition in file arena.h.

Macro Definition Documentation

arena_alloc

#define arena_alloc	(		arena,
			n
	)		ps_arena_allocate(arena, n)

Definition at line 50 of file arena.h.

arena_sprintf

#define arena_sprintf	(		arena,
			fmt,
			...
	)

Value:

    ({                                                                         \
        char* str = NULL;                                                      \
        int length = snprintf(NULL, 0, fmt, __VA_ARGS__);                      \
        if (length >= 0) {                                                     \
            str = arena_alloc(arena, length + 1);                              \
            if (str) {                                                         \
                snprintf(str, length + 1, fmt, __VA_ARGS__);                   \
            }                                                                  \
        }                                                                      \
        str;                                                                   \
    })

Definition at line 65 of file arena.h.

ast_sprintf

#define ast_sprintf	(		fmt,
			...
	)		arena_sprintf(PS_ARENA_AST, fmt, __VA_ARGS__)

Definition at line 77 of file arena.h.

ast_strndup

#define ast_strndup	(		str,
			len
	)		arena_strndup(PS_ARENA_AST, str, len)

Definition at line 63 of file arena.h.

astalloc

#define astalloc

(

n

)

arena_alloc(PS_ARENA_AST, n)

Definition at line 51 of file arena.h.

iralloc

#define iralloc

(

n

)

arena_alloc(PS_ARENA_IR, n)

Definition at line 52 of file arena.h.

PS_INITIAL_ARENA_MMAP

#define PS_INITIAL_ARENA_MMAP   0x2000000ULL

An allocation of 16MB per arena.

Definition at line 13 of file arena.h.

Enumeration Type Documentation

ps_arena_domain

enum ps_arena_domain

Enumerator
PS_ARENA_AST
PS_ARENA_IR
__PS_ARENA_COUNT

Definition at line 25 of file arena.h.

Function Documentation

arena_strndup()

char * arena_strndup	(	enum ps_arena_domain	arena,
		STR	str,
		usize	length
	)

Duplicates the specified string and produces a null-terminated arena-allocated copy.

Parameters

arena	The arena to allocate in.
str	The string to duplicate.
length	The length of the string to duplicate.

Returns

A pointer to the allocated string.

ps_arena_allocate()

void * ps_arena_allocate	(	enum ps_arena_domain	domain,
		usize	n
	)

Allocates a new object in the given arena.

Parameters

domain	The arena to allocate in.
n	The size of the object to allocate.

Returns

A pointer to the allocated object.

ps_arena_allocate_debug()

void * ps_arena_allocate_debug	(	enum ps_arena_domain	domain,
		usize	n,
		const char *	file,
		const char *	func,
		usize	line
	)

ps_arena_close()

void ps_arena_close

(

enum ps_arena_domain

domain

)

Destroys any allocated objects in the given arena.

If the arena is already closed, this function does nothing.

Parameters

domain

The arena to close.

Definition at line 45 of file arena.c.

ps_arena_open()

void ps_arena_open

(

enum ps_arena_domain

domain

)

Initializes the given arena for allocation.

Parameters

domain

The arena to initialize.

Definition at line 24 of file arena.c.