Commit d87c25e8 authored by Alexey Bayduraev's avatar Alexey Bayduraev Committed by Arnaldo Carvalho de Melo
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tools lib: Introduce fdarray duplicate function 



Introduce a function to duplicate an existing file descriptor in
the fdarray structure. The function returns the position of the duplicated
file descriptor.

Reviewed-by: default avatarRiccardo Mancini <rickyman7@gmail.com>
Signed-off-by: default avatarAlexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Tested-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarRiccardo Mancini <rickyman7@gmail.com>
Acked-by: default avatarNamhyung Kim <namhyung@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/2891f1def287d5863cc82683a4d5879195c8d90c.1642440724.git.alexey.v.bayduraev@linux.intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 7954f716

tools/lib/api/fd/array.c

+17 −0
Original line number Diff line number Diff line
@@ -88,6 +88,23 @@ int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags 
	return pos;

}



int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from)

{

	struct pollfd *entry;

	int npos;



	if (pos >= from->nr)

		return -EINVAL;



	entry = &from->entries[pos];



	npos = fdarray__add(fda, entry->fd, entry->events, from->priv[pos].flags);

	if (npos >= 0)

		fda->priv[npos] = from->priv[pos];



	return npos;

}



int fdarray__filter(struct fdarray *fda, short revents,

		    void (*entry_destructor)(struct fdarray *fda, int fd, void *arg),

		    void *arg)

tools/lib/api/fd/array.h

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 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, enum fdarray_flags flags);

int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from);

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),