Memory Module

Collaboration diagram for Memory Module:

Functions
void *	jit_getbytes (long size)
	Allocates a pointer to memory. More...
void	jit_freebytes (void *ptr, long size)
	Frees a pointer to memory. More...
void **	jit_handle_new (long size)
	Allocates a memory handle. More...
void	jit_handle_free (void **handle)
	Frees a memory handle. More...
long	jit_handle_size_get (void **handle)
	Retrieves a memory handle's size in bytes. More...
t_jit_err	jit_handle_size_set (void **handle, long size)
	Sets a memory handle's size in bytes. More...
long	jit_handle_lock (void **handle, long lock)
	Sets a memory handle's lock state. More...
void	jit_copy_bytes (void *dest, const void *src, long bytes)
	Copy bytes from source to destination pointer. More...
long	jit_freemem (void)
	Reports free memory. More...
char *	jit_newptr (long size)
	Allocates a pointer to memory. More...
void	jit_disposeptr (char *ptr)
	Frees a pointer to memory. More...

Detailed Description

Function Documentation

jit_copy_bytes()

void jit_copy_bytes	(	void *	dest,
		const void *	src,
		long	bytes
	)

Copy bytes from source to destination pointer.

Parameters

dest	destination pointer
src	source pointer
bytes	byte count to copy

References sysmem_copyptr().

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jit_disposeptr()

void jit_disposeptr

(

char *

ptr

)

Frees a pointer to memory.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_newptr and jit_disposeptr.

Parameters

ptr	pointer to memory

References sysmem_freeptr().

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jit_freebytes()

void jit_freebytes	(	void *	ptr,
		long	size
	)

Frees a pointer to memory.

Depending on the size of the pointer, jit_freebytes will free from either the faster memory pool or the system memory pool.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_getbytes and jit_freebytes.

Parameters

ptr	pointer to memory
size	size in bytes allocated

References sysmem_freeptr().

Referenced by jit_matrix_freedata(), and max_jit_obex_free().

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jit_freemem()

long jit_freemem

(

void

)

Reports free memory.

Warning

Obsolete. OS 9 only.

Returns

free bytes

jit_getbytes()

void* jit_getbytes

(

long

size

)

Allocates a pointer to memory.

Depending on the size requested, jit_getbytes will allocate from either the faster memory pool or the system memory pool.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_getbytes and jit_freebytes.

Parameters

size	size in bytes to allocate

Returns

pointer to memory

References sysmem_newptr().

Referenced by jit_matrix_getcell(), max_jit_classex_setup(), and max_jit_obex_new().

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jit_handle_free()

void jit_handle_free

(

void **

handle

)

Frees a memory handle.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_handle_new and jit_handle_free.

Parameters

handle

memory handle

References sysmem_freehandle().

Referenced by jit_matrix_free().

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jit_handle_lock()

long jit_handle_lock	(	void **	handle,
		long	lock
	)

Sets a memory handle's lock state.

Parameters

handle	memory handle
lock	state (1=locked, 0=unlocked)

Returns

lock state.

References sysmem_lockhandle().

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jit_handle_new()

void** jit_handle_new

(

long

size

)

Allocates a memory handle.

Handles are relocatable sections of memory which should be locked before dereferencing, and unlocked when not in use so that they may be relocated as necessary.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_handle_new and jit_handle_free.

Parameters

size	size in bytes to allocate

Returns

memory handle

References sysmem_newhandle().

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jit_handle_size_get()

long jit_handle_size_get

(

void **

handle

)

Retrieves a memory handle's size in bytes.

Parameters

handle

memory handle

Returns

size in bytes

References sysmem_handlesize().

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jit_handle_size_set()

t_jit_err jit_handle_size_set	(	void **	handle,
		long	size
	)

Sets a memory handle's size in bytes.

Parameters

handle	memory handle
size	new size in bytes

Returns

t_jit_err error code.

References sysmem_resizehandle().

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jit_newptr()

char* jit_newptr

(

long

size

)

Allocates a pointer to memory.

Always allocates from the the system memory pool.

Warning

It is important to avoid mixing memory pools, and therefore to match calls to jit_newptr and jit_disposeptr.

Parameters

size	size in bytes to allocate

Returns

pointer to memory

References sysmem_newptr().

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