hdl/sm_io/*: add generic pointer to a specific handler

SMIO modules often need some state information. Because of this, we store that in a new a generic field called smio_handler, inside the general sm_io structure. Specific realizations of the SMIO module need to set that pointer to the desired structure, initilize it correctly (inside bootstrap init function) and destroy it when donw (inside bootstrap shutdown function)

hdl/sm_io/*: add generic pointer to a specific handler
SMIO modules often need some state information. Because of this, we store that in a new a generic field called smio_handler, inside the general sm_io structure. Specific realizations of the SMIO module need to set that pointer to the desired structure, initilize it correctly (inside bootstrap init function) and destroy it when donw (inside bootstrap shutdown function)
e962296d · Lucas Russo · 7fb61575 · e962296d · e962296d
Commit e962296d authored Apr 25, 2014 by Lucas Russo
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sm_io.h hal/sm_io/sm_io.h +3 -0

sm_io_bootstrap.c hal/sm_io/sm_io_bootstrap.c +1 -0

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--- a/hal/sm_io/sm_io.h
+++ b/hal/sm_io/sm_io.h
@@ -37,6 +37,9 @@ struct _smio_t {
    /* int verbose; */                  /* Print activity to stdout */
    mdp_worker_t *worker;               /* zeroMQ Majordomo worker */
    struct _devio_t *parent;            /* Pointer back to parent dev_io */
+    void *smio_handler;                 /* Generic pointer to a device handler. This
+                                            must be cast to a specific type by the
+                                            devices functions */
    zctx_t *ctx;                        /* Our context */
    void *pipe;                         /* Pipe back to parent to exchange messages */


--- a/hal/sm_io/sm_io_bootstrap.c
+++ b/hal/sm_io/sm_io_bootstrap.c
@@ -165,6 +165,7 @@ static struct _smio_t *_smio_new (struct _devio_t *parent, struct _zctx_t *ctx,
    self->exp_ops_dtable = disp_table_new ();
    ASSERT_ALLOC(self->exp_ops_dtable, err_exp_ops_dtable_alloc);

+    self->smio_handler = NULL;      /* This is set by the device functions */
    self->ctx = ctx;
    self->pipe = pipe;