| /* |
| FUSE: Filesystem in Userspace |
| Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu> |
| |
| This program can be distributed under the terms of the GNU LGPL. |
| See the file COPYING.LIB. |
| */ |
| |
| #include "fuse.h" |
| #include "fuse_lowlevel.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <pthread.h> |
| |
| |
| static pthread_key_t context_key; |
| static pthread_mutex_t context_lock = PTHREAD_MUTEX_INITIALIZER; |
| static int context_ref; |
| |
| static struct fuse_context *mt_getcontext(void) |
| { |
| struct fuse_context *ctx; |
| |
| ctx = (struct fuse_context *) pthread_getspecific(context_key); |
| if (ctx == NULL) { |
| ctx = (struct fuse_context *) malloc(sizeof(struct fuse_context)); |
| if (ctx == NULL) { |
| fprintf(stderr, "fuse: failed to allocate thread specific data\n"); |
| return NULL; |
| } |
| pthread_setspecific(context_key, ctx); |
| } |
| return ctx; |
| } |
| |
| static void mt_freecontext(void *data) |
| { |
| free(data); |
| } |
| |
| static int mt_create_context_key() |
| { |
| int err = 0; |
| pthread_mutex_lock(&context_lock); |
| if (!context_ref) { |
| err = pthread_key_create(&context_key, mt_freecontext); |
| if (err) |
| fprintf(stderr, "fuse: failed to create thread specific key: %s\n", |
| strerror(err)); |
| else |
| fuse_set_getcontext_func(mt_getcontext); |
| } |
| if (!err) |
| context_ref ++; |
| pthread_mutex_unlock(&context_lock); |
| return err; |
| } |
| |
| static void mt_delete_context_key() |
| { |
| pthread_mutex_lock(&context_lock); |
| context_ref--; |
| if (!context_ref) { |
| fuse_set_getcontext_func(NULL); |
| pthread_key_delete(context_key); |
| } |
| pthread_mutex_unlock(&context_lock); |
| } |
| |
| struct procdata { |
| struct fuse *f; |
| fuse_processor_t proc; |
| void *data; |
| }; |
| |
| static void mt_generic_proc(struct fuse_ll *f, struct fuse_cmd *cmd, void *data) |
| { |
| (void) f; |
| struct procdata *pd = (struct procdata *) data; |
| pd->proc(pd->f, cmd, pd->data); |
| } |
| |
| int fuse_loop_mt_proc(struct fuse *f, fuse_processor_t proc, void *data) |
| { |
| int res; |
| struct procdata pd; |
| |
| pd.f = f; |
| pd.proc = proc; |
| pd.data = data; |
| |
| if (mt_create_context_key() != 0) |
| return -1; |
| |
| res = fuse_ll_loop_mt_proc(fuse_get_lowlevel(f), mt_generic_proc, &pd); |
| |
| mt_delete_context_key(); |
| return res; |
| } |
| |
| int fuse_loop_mt(struct fuse *f) |
| { |
| int res; |
| |
| if (mt_create_context_key() != 0) |
| return -1; |
| |
| res = fuse_ll_loop_mt(fuse_get_lowlevel(f)); |
| |
| mt_delete_context_key(); |
| return res; |
| } |
| |
| __asm__(".symver fuse_loop_mt_proc,__fuse_loop_mt@"); |