From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- tools/lib/api/fd/array.h | 59 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 tools/lib/api/fd/array.h (limited to 'tools/lib/api/fd/array.h') diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h new file mode 100644 index 000000000..5c01f7b05 --- /dev/null +++ b/tools/lib/api/fd/array.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __API_FD_ARRAY__ +#define __API_FD_ARRAY__ + +#include + +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; + struct priv { + union { + int idx; + void *ptr; + }; + unsigned int flags; + } *priv; +}; + +enum fdarray_flags { + fdarray_flag__default = 0x00000000, + fdarray_flag__nonfilterable = 0x00000001, + fdarray_flag__non_perf_event = 0x00000002, +}; + +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, 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), + 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__ */ -- cgit v1.2.3