mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-08 15:04:45 +00:00
258e4bfcbd
Before this patch there's no way to pass arguments to fdarray__filter's call back function. This improvement will be used by 'perf record' to support unmapping ring buffer for both main evlist and overwrite evlist. Without this patch there's no way to track overwrite evlist from 'struct fdarray'. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: He Kuang <hekuang@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/1464183898-174512-10-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
#ifndef __API_FD_ARRAY__
|
|
#define __API_FD_ARRAY__
|
|
|
|
#include <stdio.h>
|
|
|
|
struct pollfd;
|
|
|
|
/**
|
|
* struct fdarray: Array of file descriptors
|
|
*
|
|
* @priv: Per array entry priv area, users should access just its contents,
|
|
* not set it to anything, as it is kept in synch with @entries, being
|
|
* realloc'ed, * for instance, in fdarray__{grow,filter}.
|
|
*
|
|
* I.e. using 'fda->priv[N].idx = * value' where N < fda->nr is ok,
|
|
* but doing 'fda->priv = malloc(M)' is not allowed.
|
|
*/
|
|
struct fdarray {
|
|
int nr;
|
|
int nr_alloc;
|
|
int nr_autogrow;
|
|
struct pollfd *entries;
|
|
union {
|
|
int idx;
|
|
} *priv;
|
|
};
|
|
|
|
void fdarray__init(struct fdarray *fda, int nr_autogrow);
|
|
void fdarray__exit(struct fdarray *fda);
|
|
|
|
struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow);
|
|
void fdarray__delete(struct fdarray *fda);
|
|
|
|
int fdarray__add(struct fdarray *fda, int fd, short revents);
|
|
int fdarray__poll(struct fdarray *fda, int timeout);
|
|
int fdarray__filter(struct fdarray *fda, short revents,
|
|
void (*entry_destructor)(struct fdarray *fda, int fd, void *arg),
|
|
void *arg);
|
|
int fdarray__grow(struct fdarray *fda, int extra);
|
|
int fdarray__fprintf(struct fdarray *fda, FILE *fp);
|
|
|
|
static inline int fdarray__available_entries(struct fdarray *fda)
|
|
{
|
|
return fda->nr_alloc - fda->nr;
|
|
}
|
|
|
|
#endif /* __API_FD_ARRAY__ */
|