linux/tools/perf/util/data.h
Wang Nan 040f9915e9 perf data: Add perf_data_file__switch() helper
perf_data_file__switch() closes current output file, renames it, then
open a new one to continue recording. It will be used by 'perf record'
to split output into multiple perf.data files.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1460535673-159866-3-git-send-email-wangnan0@huawei.com
Signed-off-by: He Kuang <hekuang@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-14 08:57:54 -03:00

60 lines
1.3 KiB
C

#ifndef __PERF_DATA_H
#define __PERF_DATA_H
#include <stdbool.h>
enum perf_data_mode {
PERF_DATA_MODE_WRITE,
PERF_DATA_MODE_READ,
};
struct perf_data_file {
const char *path;
int fd;
bool is_pipe;
bool force;
unsigned long size;
enum perf_data_mode mode;
};
static inline bool perf_data_file__is_read(struct perf_data_file *file)
{
return file->mode == PERF_DATA_MODE_READ;
}
static inline bool perf_data_file__is_write(struct perf_data_file *file)
{
return file->mode == PERF_DATA_MODE_WRITE;
}
static inline int perf_data_file__is_pipe(struct perf_data_file *file)
{
return file->is_pipe;
}
static inline int perf_data_file__fd(struct perf_data_file *file)
{
return file->fd;
}
static inline unsigned long perf_data_file__size(struct perf_data_file *file)
{
return file->size;
}
int perf_data_file__open(struct perf_data_file *file);
void perf_data_file__close(struct perf_data_file *file);
ssize_t perf_data_file__write(struct perf_data_file *file,
void *buf, size_t size);
/*
* If at_exit is set, only rename current perf.data to
* perf.data.<postfix>, continue write on original file.
* Set at_exit when flushing the last output.
*
* Return value is fd of new output.
*/
int perf_data_file__switch(struct perf_data_file *file,
const char *postfix,
size_t pos, bool at_exit);
#endif /* __PERF_DATA_H */