diff options
Diffstat (limited to 'src/platform/posix')
| -rw-r--r-- | src/platform/posix/posix_file.c | 19 | ||||
| -rw-r--r-- | src/platform/posix/posix_pollq_epoll.c | 9 |
2 files changed, 27 insertions, 1 deletions
diff --git a/src/platform/posix/posix_file.c b/src/platform/posix/posix_file.c index 83d045fa..b1da3cd5 100644 --- a/src/platform/posix/posix_file.c +++ b/src/platform/posix/posix_file.c @@ -22,6 +22,11 @@ #include <sys/types.h> #include <unistd.h> +// Some systems -- Android -- have BSD flock but not POSIX lockf. +#if defined(NNG_HAVE_FLOCK) && !defined(NNG_HAVE_LOCKF) +#include <sys/file.h> +#endif + // File support. static int @@ -264,10 +269,22 @@ int nni_plat_file_lock(const char *path, nni_plat_flock *lk) { int fd; + int rv; if ((fd = open(path, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR)) < 0) { return (nni_plat_errno(errno)); } - if (lockf(fd, F_TLOCK, 0) < 0) { +#ifdef NNG_HAVE_LOCKF + rv = lockf(fd, F_TLOCK, 0); +#elif defined NNG_HAVE_FLOCK + rv = flock(fd, LOCK_EX | LOCK_NB); +#else + // We don't have locking support. This means you live dangerously. + // For example, ZeroTier cannot be sure that nothing else is using + // the same configuration file. If you're here, its probably an + // embedded scenario, and we can live with it. + rv = 0; +#endif + if (rv < 0) { int rv = errno; close(fd); if (rv == EAGAIN) { diff --git a/src/platform/posix/posix_pollq_epoll.c b/src/platform/posix/posix_pollq_epoll.c index 9c1ae682..e4f9ddb6 100644 --- a/src/platform/posix/posix_pollq_epoll.c +++ b/src/platform/posix/posix_pollq_epoll.c @@ -348,9 +348,18 @@ nni_posix_pollq_create(nni_posix_pollq *pq) { int rv; +#if NNG_HAVE_EPOLL_CREATE1 if ((pq->epfd = epoll_create1(EPOLL_CLOEXEC)) < 0) { return (nni_plat_errno(errno)); } +#else + // Old Linux. Size is a "hint" about number of descriptors. + // Hopefully not a hard limit, and not used in modern Linux. + if ((pq->epfd = epoll_create(16)) < 0) { + return (nni_plat_errno(errno)); + } + (void) fcntl(pq->epfd, F_SETFD, FD_CLOEXEC); +#endif pq->close = false; |