From: Martin Mares <mj@ucw.cz>
Date: Sat, 9 Dec 2006 21:00:38 +0000 (+0100)
Subject: Use the generic thread context to hold per-thread I/O queue.
X-Git-Tag: holmes-import~506^2~13^2~203
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=9778f344521a2a0a34582fae70f4d631c82dd7a6;p=libucw.git

Use the generic thread context to hold per-thread I/O queue.
---

diff --git a/lib/fb-direct.c b/lib/fb-direct.c
index 9262e7e1..87eae822 100644
--- a/lib/fb-direct.c
+++ b/lib/fb-direct.c
@@ -31,11 +31,11 @@
 #include "lib/lfs.h"
 #include "lib/asio.h"
 #include "lib/conf.h"
+#include "lib/threads.h"
 
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <pthread.h>
 
 static uns fbdir_cheat;
 static uns fbdir_buffer_size = 65536;
@@ -54,8 +54,6 @@ static struct cf_section fbdir_cf = {
 
 #define FBDIR_ALIGN 512
 
-static pthread_key_t fbdir_queue_key;
-
 enum fbdir_mode {				// Current operating mode
     M_NULL,
     M_READ,
@@ -80,8 +78,6 @@ static void CONSTRUCTOR
 fbdir_global_init(void)
 {
   cf_declare_section("FBDirect", &fbdir_cf, 0);
-  if (pthread_key_create(&fbdir_queue_key, NULL) < 0)
-    die("Cannot create fbdir_queue_key: %m");
 }
 
 static void
@@ -232,14 +228,15 @@ fbdir_seek(struct fastbuf *f, sh_off_t pos, int whence)
 static struct asio_queue *
 fbdir_get_io_queue(void)
 {
-  struct asio_queue *q = pthread_getspecific(fbdir_queue_key);
+  struct ucwlib_context *ctx = ucwlib_thread_context();
+  struct asio_queue *q = ctx->io_queue;
   if (!q)
     {
       q = xmalloc_zero(sizeof(struct asio_queue));
       q->buffer_size = fbdir_buffer_size;
       q->max_writebacks = fbdir_write_back;
       asio_init_queue(q);
-      pthread_setspecific(fbdir_queue_key, q);
+      ctx->io_queue = q;
     }
   q->use_count++;
   DBG("FB-DIRECT: Got I/O queue, uc=%d", q->use_count);
@@ -249,14 +246,15 @@ fbdir_get_io_queue(void)
 static void
 fbdir_put_io_queue(void)
 {
-  struct asio_queue *q = pthread_getspecific(fbdir_queue_key);
+  struct ucwlib_context *ctx = ucwlib_thread_context();
+  struct asio_queue *q = ctx->io_queue;
   ASSERT(q);
   DBG("FB-DIRECT: Put I/O queue, uc=%d", q->use_count);
   if (!--q->use_count)
     {
       asio_cleanup_queue(q);
       xfree(q);
-      pthread_setspecific(fbdir_queue_key, NULL);
+      ctx->io_queue = NULL;
     }
 }
 
diff --git a/lib/threads.h b/lib/threads.h
index 3c8b03af..70534ebb 100644
--- a/lib/threads.h
+++ b/lib/threads.h
@@ -14,6 +14,7 @@
 
 struct ucwlib_context {
   int temp_counter;			// Counter for fb-temp.c
+  struct asio_queue *io_queue;		// Async I/O queue for fb-direct.c
 };
 
 struct ucwlib_context *ucwlib_thread_context(void);