Memory Allocation

Macros
#define	XMALLOCN(type, n)
	Allocate n objects of a certain type.
#define	XMALLOCNZ(type, n)
	Allocate n objects of a certain type and zero them.
#define	XMALLOC(type)
	Allocate one object of a certain type.
#define	XMALLOCZ(type)
	Allocate one object of a certain type and zero it.
#define	XREALLOC(ptr, type, n)
	Reallocate n objects of a certain type.
#define	XMALLOCF(type, member, n)
	Allocate an object with n elements of a flexible array member.
#define	XMALLOCFZ(type, member, n)
	Allocate an object with n elements of a flexible array member and zero the whole object.
#define	ALLOCAN(type, n)
	Allocate n objects of a certain type on the stack.
#define	ALLOCANZ(type, n)
	Allocate n objects of a certain type on the stack and zero them.
#define	ALLOCAF(type, member, n)
	Allocate an object with n elements of a flexible array member on the stack.
#define	OALLOCN(obst, type, n)
	Allocate n objects of a certain type on the given obstack.
#define	OALLOCNZ(obst, type, n)
	Allocate n objects of a certain type on the given obstack and zero them.
#define	OALLOC(obst, type)
	Allocate one object of a certain type on the given obstack.
#define	OALLOCZ(obst, type)
	Allocate one object of a certain type on the given obstack and zero it.
#define	OALLOCF(obst, type, member, n)
	Allocate an object with n elements of a flexible array member on the given obstack.
#define	OALLOCFZ(obst, type, member, n)
	Allocate an object with n elements of a flexible array member on the given obstack and zero the whole object.

Functions
void *	xmalloc (size_t size)
	Allocate size bytes on the heap.
void *	xrealloc (void *ptr, size_t size)
	Chane size of a previously allocated memory block to size bytes.
char *	xstrdup (const char *str)
	Allocates memory and copies string str into it.

Detailed Description

Macro Definition Documentation

ALLOCAF

#define ALLOCAF	(		type,
			member,
			n )

Value:

((type*)alloca(offsetof(type, member) + sizeof(*((type*)0)->member) * (n)))

Allocate an object with n elements of a flexible array member on the stack.

Definition at line 107 of file xmalloc.h.

ALLOCAN

#define ALLOCAN	(		type,
			n )

Value:

((type*)alloca(sizeof(type) * (n)))

Allocate n objects of a certain type on the stack.

Definition at line 97 of file xmalloc.h.

ALLOCANZ

#define ALLOCANZ	(		type,
			n )

Value:

((type*)memset((type*)alloca(sizeof(type) * (n)), 0, sizeof(type) * (n)))

Allocate n objects of a certain type on the stack and zero them.

Definition at line 102 of file xmalloc.h.

OALLOC

#define OALLOC	(		obst,
			type )

Value:

OALLOCN(obst, type, 1)

Allocate one object of a certain type on the given obstack.

Definition at line 122 of file xmalloc.h.

OALLOCF

#define OALLOCF	(		obst,
			type,
			member,
			n )

Value:

((type*)obstack_alloc((obst), offsetof(type, member) + sizeof(*((type*)0)->member) * (n)))

Allocate an object with n elements of a flexible array member on the given obstack.

Definition at line 133 of file xmalloc.h.

OALLOCFZ

#define OALLOCFZ	(		obst,
			type,
			member,
			n )

Value:

((type*)memset(OALLOCF((obst), type, member, (n)), 0, offsetof(type, member) + sizeof(*((type*)0)->member) * (n)))

Allocate an object with n elements of a flexible array member on the given obstack and zero the whole object.

Definition at line 139 of file xmalloc.h.

OALLOCN

#define OALLOCN	(		obst,
			type,
			n )

Value:

((type*)obstack_alloc((obst), sizeof(type) * (n)))

Allocate n objects of a certain type on the given obstack.

Definition at line 112 of file xmalloc.h.

OALLOCNZ

#define OALLOCNZ	(		obst,
			type,
			n )

Value:

((type*)memset(OALLOCN((obst), type, (n)), 0, sizeof(type) * (n)))

Allocate n objects of a certain type on the given obstack and zero them.

Definition at line 117 of file xmalloc.h.

OALLOCZ

#define OALLOCZ	(		obst,
			type )

Value:

OALLOCNZ(obst, type, 1)

Allocate one object of a certain type on the given obstack and zero it.

Definition at line 127 of file xmalloc.h.

XMALLOC

#define XMALLOC

(

type

)

Value:

XMALLOCN(type, 1)

Allocate one object of a certain type.

Definition at line 71 of file xmalloc.h.

XMALLOCF

#define XMALLOCF	(		type,
			member,
			n )

Value:

((type*)xmalloc(offsetof(type, member) + sizeof(*((type*)0)->member) * (n)))

Allocate an object with n elements of a flexible array member.

Definition at line 86 of file xmalloc.h.

XMALLOCFZ

#define XMALLOCFZ	(		type,
			member,
			n )

Value:

((type*)memset(XMALLOCF(type, member, (n)), 0, offsetof(type, member) + sizeof(*((type*)0)->member) * (n)))

Allocate an object with n elements of a flexible array member and zero the whole object.

Definition at line 92 of file xmalloc.h.

XMALLOCN

#define XMALLOCN	(		type,
			n )

Value:

((type*)xmalloc(sizeof(type) * (n)))

Allocate n objects of a certain type.

Definition at line 61 of file xmalloc.h.

XMALLOCNZ

#define XMALLOCNZ	(		type,
			n )

Value:

((type*)memset(xmalloc(sizeof(type) * (n)), 0, sizeof(type) * (n)))

Allocate n objects of a certain type and zero them.

Definition at line 66 of file xmalloc.h.

XMALLOCZ

#define XMALLOCZ

(

type

)

Value:

XMALLOCNZ(type, 1)

Allocate one object of a certain type and zero it.

Definition at line 76 of file xmalloc.h.

XREALLOC

#define XREALLOC	(		ptr,
			type,
			n )

Value:

((type*)xrealloc(ptr, sizeof(type) * (n)))

Reallocate n objects of a certain type.

Definition at line 81 of file xmalloc.h.

Function Documentation

xmalloc()

void * xmalloc

(

size_t

size

)

Allocate size bytes on the heap.

This is a wrapper for malloc which calls panic() in case of errors, so no error handling is required for code using it.

xrealloc()

void * xrealloc	(	void *	ptr,
		size_t	size )

Chane size of a previously allocated memory block to size bytes.

This is a wrapper for realloc which calls panic() in case of errors, so no error handling is required for code using it.

xstrdup()

char * xstrdup

(

const char *

str

)

Allocates memory and copies string str into it.

This is a wrapper for strdup which calls panic() in case of errors, so no error handling is required for code using it.