Adding fdarray__add_clone to be able to copy/clone a specific entry from fdarray struct.
It will be useful when separating event maps for specific threads. Link: http://lkml.kernel.org/n/tip-0r9rtn1bii1iaggumlgky...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/lib/api/fd/array.c | 17 +++++++++++++++++ tools/lib/api/fd/array.h | 1 + 2 files changed, 18 insertions(+) diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c index b0a035fc87b3..cd458b46f61b 100644 --- a/tools/lib/api/fd/array.c +++ b/tools/lib/api/fd/array.c @@ -84,6 +84,23 @@ int fdarray__add(struct fdarray *fda, int fd, short revents) return pos; } +int fdarray__add_clone(struct fdarray *fda, int pos, struct fdarray *base) +{ + struct pollfd *entry; + int npos; + + if (pos >= base->nr) + return -EINVAL; + + entry = &base->entries[pos]; + + npos = fdarray__add(fda, entry->fd, entry->events); + if (npos >= 0) + fda->priv[npos] = base->priv[pos]; + + return npos; +} + int fdarray__filter(struct fdarray *fda, short revents, void (*entry_destructor)(struct fdarray *fda, int fd, void *arg), void *arg) diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h index b39557d1a88f..06e89d099b1e 100644 --- a/tools/lib/api/fd/array.h +++ b/tools/lib/api/fd/array.h @@ -34,6 +34,7 @@ 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__add_clone(struct fdarray *fda, int pos, struct fdarray *base); 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), -- 2.17.1
