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<!-- ##### SECTION Title ##### -->
cothreads
<!-- ##### SECTION Short_Description ##### -->
userspace threads
<!-- ##### SECTION Long_Description ##### -->
<para>
Cothreads are a simple user-space method for switching between
subtasks. They're based on setjmp()/longjmp() in their current form.
</para>
<para>
Cothreads are used for loop-based elements that pull data instead
of being fed with data. They can also be used to pull a specific region
of data out of their src element.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### MACRO COTHREAD_STACKSIZE ##### -->
<para>
The default stack size of a cothread.
</para>
<!-- ##### MACRO COTHREAD_MAXTHREADS ##### -->
<para>
The maximum number of cothreads we are going to support.
</para>
<!-- ##### MACRO STACK_SIZE ##### -->
<para>
</para>
<!-- ##### MACRO CURRENT_STACK_FRAME ##### -->
<para>
</para>
<!-- ##### STRUCT cothread_state ##### -->
<para>
</para>
@ctx:
@threadnum:
@func:
@argc:
@argv:
@flags:
@sp:
@jmp:
@top_sp:
@pc:
<!-- ##### STRUCT cothread_context ##### -->
<para>
</para>
@threads:
@nthreads:
@current:
@data:
<!-- ##### USER_FUNCTION cothread_func ##### -->
<para>
the function that will be called when the cothread starts. The function
prototype is like a main() function, so you can do whatever you want with
it.
</para>
@argc: a main-like argument count
@argv: a main-like array of arguments
@Returns: a return code
<!-- ##### MACRO COTHREAD_STARTED ##### -->
<para>
Indicates the cothread is started.
</para>
<!-- ##### FUNCTION cothread_init ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION cothread_create ##### -->
<para>
</para>
@ctx:
@Returns:
<!-- ##### FUNCTION cothread_setfunc ##### -->
<para>
</para>
@thread:
@func:
@argc:
@argv:
<!-- ##### FUNCTION cothread_switch ##### -->
<para>
</para>
@thread:
<!-- ##### FUNCTION cothread_getcurrent ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION cothread_main ##### -->
<para>
</para>
@ctx:
@Returns:
<!-- ##### FUNCTION cothread_set_data ##### -->
<para>
</para>
@thread:
@key:
@data:
<!-- ##### FUNCTION cothread_get_data ##### -->
<para>
</para>
@thread:
@key:
@Returns:
|
