alloc.h File Reference

Memory allocation functions. More...

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Enumerations
enum	errorcode { ERR_NONE = 0, ERR_NO_MEM }
Functions
void *	_stp_alloc (size_t len)
	Allocates memory within a probe.
void *	_stp_calloc (size_t len)
	Allocates and clears memory within a probe.
void *	_stp_valloc (size_t len)
	Allocates and clears memory outside a probe.
void	_stp_free (void *ptr)
	Frees memory allocated by _stp_alloc or _stp_calloc.
void	_stp_vfree (void *ptr)
	Frees memory allocated by _stp_valloc.
Variables
enum errorcode	_stp_error = ERR_NONE

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Detailed Description

Memory allocation functions.

Todo:

Should really be alloc.c for consistency.

Definition in file alloc.h.

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Function Documentation

void* _stp_alloc (  size_t  len  )

Allocates memory within a probe. This is used for small allocations from within a running probe where the process cannot sleep. Parameters: len  Number of bytes to allocate. Returns: a valid pointer on success or NULL on failure. Bug: Currently uses kmalloc (GFP_ATOMIC). Definition at line 18 of file alloc.h. Referenced by _stp_calloc(), and _stp_map_set_str().

void* _stp_calloc (  size_t  len  )

Allocates and clears memory within a probe. This is used for small allocations from within a running probe where the process cannot sleep. Parameters: len  Number of bytes to allocate. Returns: a valid pointer on success or NULL on failure. Bug: Currently uses kmalloc (GFP_ATOMIC). Definition at line 34 of file alloc.h. References _stp_alloc(). Referenced by _stp_map_set_stat(), and _stp_map_set_str().

void _stp_free (  void *  ptr  )

Frees memory allocated by _stp_alloc or _stp_calloc. Parameters: ptr  pointer to memory to free Definition at line 63 of file alloc.h. Referenced by _stp_list_clear(), _stp_map_key_del(), and _stp_map_set_str().

void* _stp_valloc (  size_t  len  )

Allocates and clears memory outside a probe. This is typically used in the module initialization to allocate new maps, lists, etc. Parameters: len  Number of bytes to allocate. Returns: a valid pointer on success or NULL on failure. Definition at line 49 of file alloc.h. Referenced by _stp_map_new().

void _stp_vfree (  void *  ptr  )

Frees memory allocated by _stp_valloc. Parameters: ptr  pointer to memory to free Definition at line 73 of file alloc.h. Referenced by _stp_map_del().