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helper: add free_n method to handle clearing pointers

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free_n() will free the memory and clear the pointer, which will reduce
the probability a developer will forget to clear the pointer after
freeing.

Resolves: #79

Signed-off-by: Patrick Venture <venture@google.com>
This commit is contained in:
Patrick Venture 2018-12-05 08:55:59 -08:00 committed by Alexander Amelkin
parent 34fc86bd75
commit 8b6d127bb1
1 changed files with 11 additions and 0 deletions
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11
include/ipmitool/helper.h
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@ -119,6 +119,17 @@ uint16_t ipmi_get_oem_id(struct ipmi_intf *intf);
#define IS_SET(v, b) ((v) & (1 << (b)))
/**
* Free the memory and clear the pointer.
* @param[in] ptr - a pointer to your pointer to free.
*/
static inline void free_n(void **ptr) {
if (ptr && *ptr) {
free(*ptr);
*ptr = NULL;
}
}
/* le16toh(), hto16le(), et. al. don't exist for Windows or Apple */
/* For portability, let's simply define our own versions here */