tree eb99ee33781cc79ab09f2d70c93f14c90c664f91
parent d358e75fc40cc3bbab11654ba0a88b232c543d12
author Robert Richter <robert.richter@amd.com> 1230222367 +0100
committer Robert Richter <robert.richter@amd.com> 1231364264 +0100

oprofile: add op_cpu_buffer_write_reserve()

This function prepares the cpu buffer to write a sample.

Struct op_entry is used during operations on the ring buffer while
struct op_sample contains the data that is stored in the ring
buffer. Struct entry can be uninitialized. The function reserves a
data array that is specified by size. Use op_cpu_buffer_write_commit()
after preparing the sample. In case of errors a null pointer is
returned, otherwise the pointer to the sample.

Signed-off-by: Robert Richter <robert.richter@amd.com>