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ibv_alloc_td(3) — Linux manual page

IBV_ALLOC_TD(3)       Libibverbs Programmer's ManualIBV_ALLOC_TD(3)

NAME        top

       ibv_alloc_td(), ibv_dealloc_td() - allocate and deallocate thread       domain object

SYNOPSIS        top

#include <infiniband/verbs.h>struct ibv_td *ibv_alloc_td(struct ibv_context*context,struct ibv_td_init_attr*init_attr);int ibv_dealloc_td(struct ibv_td*td);

DESCRIPTION        top

ibv_alloc_td()allocates a thread domain object for the RDMA       device contextcontext.       The thread domain object defines how the verbs libraries and       provider will use locks and additional hardware capabilities to       achieve best performance for handling multi-thread or single-       thread protection.  An application assigns verbs resources to a       thread domain when it creates a verbs object.       If theibv_td object is specified then any objects created under       this thread domain will disable internal locking designed to       protect against concurrent access to that object from multiple       user threads. By default all verbs objects are safe for multi-       threaded access, whether or not a thread domain is specified.       Astruct ibv_td can be added to a parent domain viaibv_alloc_parent_domain()and then the parent domain can be used       to create verbs objects.ibv_dealloc_td()will deallocate the thread domaintd.  All       resources created with thetd should be destroyed prior to       deallocating thetd.

RETURN VALUE        top

ibv_alloc_td()returns a pointer to the allocated structibv_td       object, or NULL if the request fails (and sets errno to indicate       the failure reason).ibv_dealloc_td()returns 0 on success, or the value of errno on       failure (which indicates the failure reason).

SEE ALSO        top

ibv_alloc_parent_domain(3),

AUTHORS        top

       Alex Rosenbaum <alexr@mellanox.com>       Yishai Hadas <yishaih@mellanox.com>

COLOPHON        top

       This page is part of therdma-core (RDMA Core Userspace Libraries       and Daemons) project.  Information about the project can be found       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug       report for this manual page, send it to       linux-rdma@vger.kernel.org.  This page was obtained from the       project's upstream Git repository       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11.  (At       that time, the date of the most recent commit that was found in       the repository was 2025-08-04.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.orglibibverbs                      2017-11-06IBV_ALLOC_TD(3)

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