stdin.c: btr preparations.
authorAndre Noll <maan@systemlinux.org>
Tue, 29 Dec 2009 00:26:24 +0000 (01:26 +0100)
committerAndre Noll <maan@systemlinux.org>
Tue, 29 Dec 2009 00:26:24 +0000 (01:26 +0100)
buffer_tree.c
buffer_tree.h
error.h
http_recv.c
stdin.c
stdin.h

index 1046460..1ca4a15 100644 (file)
@@ -124,7 +124,7 @@ void btr_pushdown(struct btr_node *btrn)
 }
 
 /* Return true if this node has no children. */
-bool btr_is_leaf_node(struct btr_node *btrn)
+bool btr_no_children(struct btr_node *btrn)
 {
        return list_empty(&btrn->children);
 }
index d340973..0421780 100644 (file)
@@ -4,7 +4,7 @@ struct btr_node;
 struct btr_node *btr_new_node(char *name, struct btr_node *parent);
 void btr_del_node(struct btr_node *btrn);
 void btr_add_output(char *buf, size_t size, struct btr_node *btrn);
-bool btr_is_leaf_node(struct btr_node *btrn);
+bool btr_no_children(struct btr_node *btrn);
 size_t btr_bytes_pending(struct btr_node *btrn);
 size_t btr_get_input_queue_size(struct btr_node *btrn);
 bool btr_no_parent(struct btr_node *btrn);
diff --git a/error.h b/error.h
index 4aec60d..9ef417f 100644 (file)
--- a/error.h
+++ b/error.h
@@ -216,6 +216,7 @@ extern const char **para_errlist[];
 
 #define STDIN_ERRORS \
        PARA_ERROR(STDIN_EOF, "end of file"), \
+       PARA_ERROR(STDIN_NO_CHILD, "stdin btr node has no children"), \
 
 
 
@@ -238,6 +239,7 @@ extern const char **para_errlist[];
 
 #define HTTP_RECV_ERRORS \
        PARA_ERROR(HTTP_RECV_OVERRUN, "http_recv: output buffer overrun"), \
+       PARA_ERROR(HTTP_RECV_NO_CHILD, "http_recv btr node has no children"), \
 
 
 #define RECV_COMMON_ERRORS \
index abb8c1e..a6d792b 100644 (file)
@@ -136,6 +136,10 @@ static void http_recv_post_select(struct sched *s, struct task *t)
        if (conf->buffer_tree_given) {
                char *buf;
 
+               if (btr_no_children(rn->btrn)) {
+                       t->error = -E_HTTP_RECV_NO_CHILD;
+                       goto err;
+               }
                if (btr_bytes_pending(rn->btrn) > HTTP_RECV_MAX_PENDING) {
                        t->error = -E_HTTP_RECV_OVERRUN;
                        goto err;
diff --git a/stdin.c b/stdin.c
index f66d1bb..d080e21 100644 (file)
--- a/stdin.c
+++ b/stdin.c
@@ -8,6 +8,8 @@
 
 #include <dirent.h> /* readdir() */
 #include <assert.h>
+#include <stdbool.h>
+#include <regex.h>
 
 #include "para.h"
 #include "list.h"
@@ -15,6 +17,8 @@
 #include "fd.h"
 #include "error.h"
 #include "stdin.h"
+#include "buffer_tree.h"
+#include "string.h"
 
 /**
  * The pre_select function of the stdin task.
@@ -42,6 +46,27 @@ static void stdin_pre_select(struct sched *s, struct task *t)
        para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
 }
 
+#define STDIN_MAX_PENDING (1024 * 1024)
+
+static void stdin_pre_select_btr(struct sched *s, struct task *t)
+{
+       struct stdin_task *sit = container_of(t, struct stdin_task, task);
+
+       if (btr_no_children(sit->btrn)) {
+               t->error = -E_STDIN_NO_CHILD;
+               btr_del_node(sit->btrn);
+               sit->btrn = NULL;
+               return;
+       }
+       t->error = 0;
+       if (btr_bytes_pending(sit->btrn) > STDIN_MAX_PENDING)
+               sit->check_fd = 0;
+       else {
+               sit->check_fd = 1;
+               para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
+       }
+}
+
 /**
  * The post select function of the stdin task.
  *
@@ -76,6 +101,39 @@ static void stdin_post_select(struct sched *s, struct task *t)
                t->error = -E_STDIN_EOF;
 }
 
+#define STDIN_INPUT_BUFFER_SIZE 4000
+static void stdin_post_select_btr(struct sched *s, struct task *t)
+{
+       struct stdin_task *sit = container_of(t, struct stdin_task, task);
+       ssize_t ret;
+       char *buf = NULL;
+
+       t->error = -E_STDIN_NO_CHILD;
+       if (btr_no_children(sit->btrn))
+               goto err;
+
+       t->error = 0;
+       if (!sit->check_fd)
+               return;
+       if (!FD_ISSET(STDIN_FILENO, &s->rfds))
+               return;
+
+       buf = para_malloc(STDIN_INPUT_BUFFER_SIZE);
+       ret = read(STDIN_FILENO, buf, STDIN_INPUT_BUFFER_SIZE);
+       if (ret < 0)
+               t->error = -ERRNO_TO_PARA_ERROR(errno);
+       if (ret == 0)
+               t->error = -E_STDIN_EOF;
+       if (t->error < 0)
+               goto err;
+       btr_add_output(buf, ret, sit->btrn);
+       return;
+err:
+       free(buf);
+       btr_del_node(sit->btrn);
+       sit->btrn = NULL;
+}
+
 /**
  * Initialize a stdin task structure with default values.
  *
@@ -89,9 +147,14 @@ void stdin_set_defaults(struct stdin_task *sit)
 {
        int ret;
 
-       sit->bufsize = 32 * 1024,
-       sit->task.pre_select = stdin_pre_select;
-       sit->task.post_select = stdin_post_select;
+       sit->bufsize = 32 * 1024;
+       if (sit->btrn) {
+               sit->task.pre_select = stdin_pre_select_btr;
+               sit->task.post_select = stdin_post_select_btr;
+       } else {
+               sit->task.pre_select = stdin_pre_select;
+               sit->task.post_select = stdin_post_select;
+       }
        sprintf(sit->task.status, "stdin reader");
        ret = mark_fd_nonblocking(STDIN_FILENO);
        if (ret >= 0)
diff --git a/stdin.h b/stdin.h
index edb72cf..8e5b3ce 100644 (file)
--- a/stdin.h
+++ b/stdin.h
@@ -20,6 +20,8 @@ struct stdin_task {
        int check_fd;
        /** The task structure. */
        struct task task;
+       /** Non-null if buffer tree API should be used. */
+       struct btr_node *btrn;
 };
 
 void stdin_set_defaults(struct stdin_task *sit);