diff options
Diffstat (limited to 'src/svm/svm.c')
| -rw-r--r-- | src/svm/svm.c | 193 |
1 files changed, 102 insertions, 91 deletions
diff --git a/src/svm/svm.c b/src/svm/svm.c index f97803cd7af..c54f9730094 100644 --- a/src/svm/svm.c +++ b/src/svm/svm.c @@ -434,6 +434,107 @@ shm_name_from_svm_map_region_args (svm_map_region_args_t * a) return (shm_name); } +void +svm_region_init_mapped_region (svm_map_region_args_t * a, svm_region_t * rp) +{ + pthread_mutexattr_t attr; + pthread_condattr_t cattr; + int nbits, words, bit; + int overhead_space; + void *oldheap; + uword data_base; + ASSERT (rp); + int rv; + + memset (rp, 0, sizeof (*rp)); + + if (pthread_mutexattr_init (&attr)) + clib_unix_warning ("mutexattr_init"); + + if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED)) + clib_unix_warning ("mutexattr_setpshared"); + + if (pthread_mutex_init (&rp->mutex, &attr)) + clib_unix_warning ("mutex_init"); + + if (pthread_mutexattr_destroy (&attr)) + clib_unix_warning ("mutexattr_destroy"); + + if (pthread_condattr_init (&cattr)) + clib_unix_warning ("condattr_init"); + + if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED)) + clib_unix_warning ("condattr_setpshared"); + + if (pthread_cond_init (&rp->condvar, &cattr)) + clib_unix_warning ("cond_init"); + + if (pthread_condattr_destroy (&cattr)) + clib_unix_warning ("condattr_destroy"); + + region_lock (rp, 1); + + rp->virtual_base = a->baseva; + rp->virtual_size = a->size; + + rp->region_heap = + mheap_alloc_with_flags (uword_to_pointer + (a->baseva + MMAP_PAGESIZE, void *), + (a->pvt_heap_size != + 0) ? a->pvt_heap_size : SVM_PVT_MHEAP_SIZE, + MHEAP_FLAG_DISABLE_VM); + oldheap = svm_push_pvt_heap (rp); + + rp->region_name = (char *) format (0, "%s%c", a->name, 0); + vec_add1 (rp->client_pids, getpid ()); + + nbits = rp->virtual_size / MMAP_PAGESIZE; + + ASSERT (nbits > 0); + rp->bitmap_size = nbits; + words = (nbits + BITS (uword) - 1) / BITS (uword); + vec_validate (rp->bitmap, words - 1); + + overhead_space = MMAP_PAGESIZE /* header */ + + ((a->pvt_heap_size != 0) ? a->pvt_heap_size : SVM_PVT_MHEAP_SIZE); + + bit = 0; + data_base = (uword) rp->virtual_base; + + if (a->flags & SVM_FLAGS_NODATA) + rp->flags |= SVM_FLAGS_NEED_DATA_INIT; + + do + { + clib_bitmap_set_no_check (rp->bitmap, bit, 1); + bit++; + overhead_space -= MMAP_PAGESIZE; + data_base += MMAP_PAGESIZE; + } + while (overhead_space > 0); + + rp->data_base = (void *) data_base; + + /* + * Note: although the POSIX spec guarantees that only one + * process enters this block, we have to play games + * to hold off clients until e.g. the mutex is ready + */ + rp->version = SVM_VERSION; + + /* setup the data portion of the region */ + + rv = svm_data_region_create (a, rp); + if (rv) + { + clib_warning ("data_region_create: %d", rv); + } + + region_unlock (rp); + + svm_pop_heap (oldheap); +} + /* * svm_map_region */ @@ -442,15 +543,10 @@ svm_map_region (svm_map_region_args_t * a) { int svm_fd; svm_region_t *rp; - pthread_mutexattr_t attr; - pthread_condattr_t cattr; int deadman = 0; u8 junk = 0; void *oldheap; - int overhead_space; int rv; - uword data_base; - int nbits, words, bit; int pid_holding_region_lock; u8 *shm_name; int dead_region_recovery = 0; @@ -502,93 +598,8 @@ svm_map_region (svm_map_region_args_t * a) return (0); } close (svm_fd); - memset (rp, 0, sizeof (*rp)); - - if (pthread_mutexattr_init (&attr)) - clib_unix_warning ("mutexattr_init"); - - if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED)) - clib_unix_warning ("mutexattr_setpshared"); - - if (pthread_mutex_init (&rp->mutex, &attr)) - clib_unix_warning ("mutex_init"); - if (pthread_mutexattr_destroy (&attr)) - clib_unix_warning ("mutexattr_destroy"); - - if (pthread_condattr_init (&cattr)) - clib_unix_warning ("condattr_init"); - - if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED)) - clib_unix_warning ("condattr_setpshared"); - - if (pthread_cond_init (&rp->condvar, &cattr)) - clib_unix_warning ("cond_init"); - - if (pthread_condattr_destroy (&cattr)) - clib_unix_warning ("condattr_destroy"); - - region_lock (rp, 1); - - rp->virtual_base = a->baseva; - rp->virtual_size = a->size; - - rp->region_heap = - mheap_alloc_with_flags (uword_to_pointer - (a->baseva + MMAP_PAGESIZE, void *), - (a->pvt_heap_size != - 0) ? a->pvt_heap_size : SVM_PVT_MHEAP_SIZE, - MHEAP_FLAG_DISABLE_VM); - oldheap = svm_push_pvt_heap (rp); - - rp->region_name = (char *) format (0, "%s%c", a->name, 0); - vec_add1 (rp->client_pids, getpid ()); - - nbits = rp->virtual_size / MMAP_PAGESIZE; - - ASSERT (nbits > 0); - rp->bitmap_size = nbits; - words = (nbits + BITS (uword) - 1) / BITS (uword); - vec_validate (rp->bitmap, words - 1); - - overhead_space = MMAP_PAGESIZE /* header */ + - ((a->pvt_heap_size != 0) ? a->pvt_heap_size : SVM_PVT_MHEAP_SIZE); - - bit = 0; - data_base = (uword) rp->virtual_base; - - if (a->flags & SVM_FLAGS_NODATA) - rp->flags |= SVM_FLAGS_NEED_DATA_INIT; - - do - { - clib_bitmap_set_no_check (rp->bitmap, bit, 1); - bit++; - overhead_space -= MMAP_PAGESIZE; - data_base += MMAP_PAGESIZE; - } - while (overhead_space > 0); - - rp->data_base = (void *) data_base; - - /* - * Note: although the POSIX spec guarantees that only one - * process enters this block, we have to play games - * to hold off clients until e.g. the mutex is ready - */ - rp->version = SVM_VERSION; - - /* setup the data portion of the region */ - - rv = svm_data_region_create (a, rp); - if (rv) - { - clib_warning ("data_region_create: %d", rv); - } - - region_unlock (rp); - - svm_pop_heap (oldheap); + svm_region_init_mapped_region (a, rp); return ((void *) rp); } |