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author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-12-02 12:38:54 -0500 |
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committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-12-06 14:52:18 -0500 |
commit | 21ba63364517430ac7f8b7d7d126888e8b2e504f (patch) | |
tree | 5022db93eceb2edcd78507ac86dbf778075f349f | |
parent | da2e9798df4e0f2acf0bd5c67a4eddfda4b1e129 (diff) | |
download | libtraceevent-21ba63364517430ac7f8b7d7d126888e8b2e504f.tar.gz |
libtraceevent: Add kbuffer_create()
The kbuffer_alloc() is awkward to use as the size and endianess needs to
be passed in by enum values. Add a kbuffer_create() that only takes a tep
handle, and it determines these values via the handle instead.
Link: https://lore.kernel.org/linux-trace-devel/20221202123854.5761a742@gandalf.local.home
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
-rw-r--r-- | include/traceevent/kbuffer.h | 1 | ||||
-rw-r--r-- | src/parse-utils.c | 26 |
2 files changed, 27 insertions, 0 deletions
diff --git a/include/traceevent/kbuffer.h b/include/traceevent/kbuffer.h index a2b5220..66b0958 100644 --- a/include/traceevent/kbuffer.h +++ b/include/traceevent/kbuffer.h @@ -29,6 +29,7 @@ enum { struct kbuffer; struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian); +struct kbuffer *kbuffer_create(struct tep_handle *tep); void kbuffer_free(struct kbuffer *kbuf); int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer); void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts); diff --git a/src/parse-utils.c b/src/parse-utils.c index 09059ed..ffa6c58 100644 --- a/src/parse-utils.c +++ b/src/parse-utils.c @@ -11,6 +11,7 @@ #include "event-utils.h" #include "event-parse.h" +#include "kbuffer.h" #define __weak __attribute__((weak)) @@ -122,3 +123,28 @@ void __weak __vpr_stat(const char *fmt, va_list ap) } void vpr_stat(const char *fmt, va_list ap) __attribute__((weak, alias("__vpr_stat"))); + +/** + * kbuffer_create - create and allocate a new kbuffer + * @tep: the data to get the long size and endianess from + * + * Allocates and returns a new kbuffer. + */ +struct kbuffer *kbuffer_create(struct tep_handle *tep) +{ + enum kbuffer_endian endian; + int long_size; + + long_size = tep_get_long_size(tep); + if (long_size == 8) + long_size = KBUFFER_LSIZE_8; + else + long_size = KBUFFER_LSIZE_4; + + if (tep_is_file_bigendian(tep)) + endian = KBUFFER_ENDIAN_BIG; + else + endian = KBUFFER_ENDIAN_LITTLE; + + return kbuffer_alloc(long_size, endian); +} |