diff options
author | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2018-06-18 13:36:41 +0200 |
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committer | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2018-06-19 08:22:47 +0200 |
commit | e4df4d55df003957fc5afd7440e3d3192d7ce218 (patch) | |
tree | 4d87da85a727b31f1a76de49f6c4d31cedda71b7 /lib/librte_vhost/fd_man.c | |
parent | d038355bf358f713efbb182f174e2a8a09042e2b (diff) |
New upstream version 17.11.3
Change-Id: I2b901aaf362a2b94195665cc890d824b2c3a620e
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Diffstat (limited to 'lib/librte_vhost/fd_man.c')
-rw-r--r-- | lib/librte_vhost/fd_man.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/librte_vhost/fd_man.c b/lib/librte_vhost/fd_man.c index 4c6fed41..173ec75c 100644 --- a/lib/librte_vhost/fd_man.c +++ b/lib/librte_vhost/fd_man.c @@ -200,6 +200,38 @@ fdset_del(struct fdset *pfdset, int fd) return dat; } +/** + * Unregister the fd from the fdset. + * + * If parameters are invalid, return directly -2. + * And check whether fd is busy, if yes, return -1. + * Otherwise, try to delete the fd from fdset and + * return true. + */ +int +fdset_try_del(struct fdset *pfdset, int fd) +{ + int i; + + if (pfdset == NULL || fd == -1) + return -2; + + pthread_mutex_lock(&pfdset->fd_mutex); + i = fdset_find_fd(pfdset, fd); + if (i != -1 && pfdset->fd[i].busy) { + pthread_mutex_unlock(&pfdset->fd_mutex); + return -1; + } + + if (i != -1) { + pfdset->fd[i].fd = -1; + pfdset->fd[i].rcb = pfdset->fd[i].wcb = NULL; + pfdset->fd[i].dat = NULL; + } + + pthread_mutex_unlock(&pfdset->fd_mutex); + return 0; +} /** * This functions runs in infinite blocking loop until there is no fd in |