[M] Change in libosmocore[master]: osmo_io: Remove union in struct osmo_io_ops

Attention is currently required from: arehbein, laforge, neels, pespin. daniel has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/35079?usp=email ) Change subject: osmo_io: Remove union in struct osmo_io_ops ...................................................................... Patch Set 4: (2 comments) File src/core/osmo_io.c: https://gerrit.osmocom.org/c/libosmocore/+/35079/comment/1bcca390_cafaad48 PS3, Line 546: if (iofd->io_ops.read_cb) This fix is only necessary after removing the union. I don't see how you could realize checking the exact member with the union in place. I can basically stick an ```c OSMO_ASSERT(&iofd->io_ops.read_cb == &iofd->io_ops.recvfrom_cb) ``` in here. Unless I'm missing something this is exactly the feature of the union, afterwards you can't know whether this memory location was set as read_cb or recvfrom_cb. File src/core/osmo_io.c: https://gerrit.osmocom.org/c/libosmocore/+/35079/comment/813d11cc_3e337a84 PS4, Line 391: || (iofd->mode == OSMO_IO_FD_MODE_RECVFROM_SENDTO && iofd->io_ops.recvfrom_cb)); It "works" in the sense that it even returns true if mode == *_READ_WRITE and .recvfrom_cb (or the other way around) is set since both function pointers are sharing the same memory location. -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35079?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I138d57843edc29000530bb7896bcb239002ecbec Gerrit-Change-Number: 35079 Gerrit-PatchSet: 4 Gerrit-Owner: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: arehbein <arehbein(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-CC: neels <nhofmeyr(a)sysmocom.de> Gerrit-CC: pespin <pespin(a)sysmocom.de> Gerrit-Attention: neels <nhofmeyr(a)sysmocom.de> Gerrit-Attention: arehbein <arehbein(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Comment-Date: Fri, 01 Dec 2023 10:05:01 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: neels <nhofmeyr(a)sysmocom.de> Comment-In-Reply-To: daniel <dwillmann(a)sysmocom.de> Gerrit-MessageType: comment