#include <dirent.h> /* readdir() */
#include <assert.h>
+#include <stdbool.h>
+#include <regex.h>
#include "para.h"
#include "list.h"
#include "fd.h"
#include "error.h"
#include "stdin.h"
+#include "buffer_tree.h"
+#include "string.h"
/**
* The pre_select function of the stdin task.
para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
}
+static void stdin_pre_select_btr(struct sched *s, struct task *t)
+{
+ struct stdin_task *sit = container_of(t, struct stdin_task, task);
+ int ret;
+
+ t->error = 0;
+ ret = btr_node_status(sit->btrn, 0, BTR_NT_ROOT);
+ if (ret > 0)
+ para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
+ else if (ret < 0) {
+ s->timeout.tv_sec = 0;
+ s->timeout.tv_usec = 1;
+ }
+}
+
/**
* The post select function of the stdin task.
*
t->error = -E_STDIN_EOF;
}
+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;
+ size_t sz;
+ char *buf = NULL;
+
+ t->error = 0;
+ ret = btr_node_status(sit->btrn, 0, BTR_NT_ROOT);
+ if (ret < 0)
+ goto err;
+ if (ret == 0)
+ return;
+ if (!FD_ISSET(STDIN_FILENO, &s->rfds))
+ return;
+ sz = btr_pool_get_buffer(sit->btrp, &buf);
+ ret = -E_STDIN_OVERRUN;
+ if (sz == 0)
+ goto err;
+ /*
+ * Do not use the maximal size to avoid having only a single buffer
+ * reference for the whole pool. This is bad because if that single
+ * reference can not be freed, we're stuck.
+ */
+ sz = PARA_MIN(sz, btr_pool_size(sit->btrp) / 2);
+ ret = read(STDIN_FILENO, buf, sz);
+ //PARA_CRIT_LOG("read ret: %d\n", ret);
+ if (ret < 0)
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ if (ret == 0)
+ ret = -E_STDIN_EOF;
+ if (ret < 0)
+ goto err;
+ btr_add_output_pool(sit->btrp, ret, sit->btrn);
+ return;
+err:
+ btr_remove_node(sit->btrn);
+ //btr_pool_free(sit->btrp);
+ t->error = ret;
+}
+
/**
* Initialize a stdin task structure with default values.
*
*
* This fills in the pre/post select function pointers of the task structure
* given by \a sit. Moreover, the stdin file desctiptor is set to nonblocking
- * mode and \a bufsize is initialized to 16 KB (but no buffer is allocated).
+ * mode and \a bufsize is initialized (but no buffer is allocated).
*/
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;
+ sit->btrp = btr_pool_new("stdin", 64 * 1024);
+ } 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)