Change in libosmocore[master]: Add osmo_io with initial poll backend

Attention is currently required from: osmith, Hoernchen, neels, laforge, fixeria, daniel. pespin has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/30934 ) Change subject: Add osmo_io with initial poll backend ...................................................................... Patch Set 5: (6 comments) File include/osmocom/core/osmo_io.h: https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/d9628e2d_f17a91bf PS5, Line 57: int osmo_iofd_sendto_msgb(struct osmo_io_fd *iofd, struct msgb *msg, int flags, maybe name it sendto_flags to clarify what are the flags for, but not that important. File src/core/osmo_io.c: https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/ca524f17_c67c82bf PS5, Line 210: * If there are bytes left over *pending_out will point to a msgb with the remaining data. " If there are bytes left over, *pending_out will" (see extra comma) https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/7c6dffd2_0e001c04 PS5, Line 426: if (!osmo_iofd_ops.close || (osmo_iofd_ops.close && osmo_iofd_ops.close(iofd))) There seems to be a lot of expected stuff happening here with regards to struct configuration and return codes from function pointers. I think this deserves a comment here explaining the expected lifecycle. File src/osmo_io_poll.c: https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/1fa54ade_1463fb7d PS3, Line 71: rc = write(ofd->fd, msgb_data(msg), msgb_length(msg)); read/write is basically recv/send with flags=0, so there's no need to have read/write imho. https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/f4a749b6_e40208a1 PS3, Line 84: / Ack https://gerrit.osmocom.org/c/libosmocore/+/30934/comment/c7a750bf_aea0ba83 PS3, Line 143: / Ack -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/30934 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I50d73cf550d6ce8154bf827bf47408131cf5b0a0 Gerrit-Change-Number: 30934 Gerrit-PatchSet: 5 Gerrit-Owner: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: Hoernchen <ewild(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: neels <nhofmeyr(a)sysmocom.de> Gerrit-Reviewer: osmith <osmith(a)sysmocom.de> Gerrit-Reviewer: pespin <pespin(a)sysmocom.de> Gerrit-CC: laforge <laforge(a)osmocom.org> Gerrit-Attention: osmith <osmith(a)sysmocom.de> Gerrit-Attention: Hoernchen <ewild(a)sysmocom.de> Gerrit-Attention: neels <nhofmeyr(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Attention: daniel <dwillmann(a)sysmocom.de> Gerrit-Comment-Date: Fri, 03 Feb 2023 15:29:55 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: laforge <laforge(a)osmocom.org> Comment-In-Reply-To: pespin <pespin(a)sysmocom.de> Comment-In-Reply-To: daniel <dwillmann(a)sysmocom.de> Gerrit-MessageType: comment