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Add pios_struct_helper to PiOS.osx

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This commit is contained in:
James Cotton 2012-07-23 09:19:28 -05:00
parent 05643d2f2b
commit cf6b49535a
1 changed files with 12 additions and 0 deletions
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12
flight/PiOS.osx/inc/pios_struct_helper.h Normal file
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/* Taken from include/linux/kernel.h from the Linux kernel tree */
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})