write/alsa: Add btr support.

[paraslash.git] / stdin.c

diff --git a/stdin.c b/stdin.c
index f66d1bba325f557e09588cf6b256abce8a99bb53..836369992f01b7f7a62c1b33c5674a13ba6ee89c 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 (100 * 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 +101,40 @@ 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);
+       //PARA_CRIT_LOG("read ret: %d\n", ret);
+       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 +148,14 @@ 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)