davide carboni
/
pymite_http_get
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src/vm/thread.h@0:14e5e829dffe, 2010-07-21 (annotated)
- Committer:
- dadaista
- Date:
- Wed Jul 21 12:50:41 2010 +0000
- Revision:
- 0:14e5e829dffe
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dadaista | 0:14e5e829dffe | 1 | /* |
| dadaista | 0:14e5e829dffe | 2 | # This file is Copyright 2007, 2009 Dean Hall. |
| dadaista | 0:14e5e829dffe | 3 | # |
| dadaista | 0:14e5e829dffe | 4 | # This file is part of the PyMite VM. |
| dadaista | 0:14e5e829dffe | 5 | # The PyMite VM is free software: you can redistribute it and/or modify |
| dadaista | 0:14e5e829dffe | 6 | # it under the terms of the GNU GENERAL PUBLIC LICENSE Version 2. |
| dadaista | 0:14e5e829dffe | 7 | # |
| dadaista | 0:14e5e829dffe | 8 | # The PyMite VM is distributed in the hope that it will be useful, |
| dadaista | 0:14e5e829dffe | 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| dadaista | 0:14e5e829dffe | 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| dadaista | 0:14e5e829dffe | 11 | # A copy of the GNU GENERAL PUBLIC LICENSE Version 2 |
| dadaista | 0:14e5e829dffe | 12 | # is seen in the file COPYING in this directory. |
| dadaista | 0:14e5e829dffe | 13 | */ |
| dadaista | 0:14e5e829dffe | 14 | |
| dadaista | 0:14e5e829dffe | 15 | |
| dadaista | 0:14e5e829dffe | 16 | #ifndef __THREAD_H__ |
| dadaista | 0:14e5e829dffe | 17 | #define __THREAD_H__ |
| dadaista | 0:14e5e829dffe | 18 | |
| dadaista | 0:14e5e829dffe | 19 | |
| dadaista | 0:14e5e829dffe | 20 | /** |
| dadaista | 0:14e5e829dffe | 21 | * \file |
| dadaista | 0:14e5e829dffe | 22 | * \brief VM Thread |
| dadaista | 0:14e5e829dffe | 23 | * |
| dadaista | 0:14e5e829dffe | 24 | * Encapsulating a frame pointer, a root code object and thread state. |
| dadaista | 0:14e5e829dffe | 25 | */ |
| dadaista | 0:14e5e829dffe | 26 | |
| dadaista | 0:14e5e829dffe | 27 | |
| dadaista | 0:14e5e829dffe | 28 | #include "interp.h" |
| dadaista | 0:14e5e829dffe | 29 | |
| dadaista | 0:14e5e829dffe | 30 | |
| dadaista | 0:14e5e829dffe | 31 | /** Frequency in Hz to switch threads */ |
| dadaista | 0:14e5e829dffe | 32 | #define THREAD_RESCHEDULE_FREQUENCY 10 |
| dadaista | 0:14e5e829dffe | 33 | |
| dadaista | 0:14e5e829dffe | 34 | |
| dadaista | 0:14e5e829dffe | 35 | /** |
| dadaista | 0:14e5e829dffe | 36 | * Interpreter return values |
| dadaista | 0:14e5e829dffe | 37 | * |
| dadaista | 0:14e5e829dffe | 38 | * Used to control interpreter loop |
| dadaista | 0:14e5e829dffe | 39 | * and indicate return value. |
| dadaista | 0:14e5e829dffe | 40 | * Negative values indicate erroneous results. |
| dadaista | 0:14e5e829dffe | 41 | * Positive values indicate "continue interpreting", |
| dadaista | 0:14e5e829dffe | 42 | * but first do something special like reschedule threads |
| dadaista | 0:14e5e829dffe | 43 | * or (TBD) sweep the heap. |
| dadaista | 0:14e5e829dffe | 44 | */ |
| dadaista | 0:14e5e829dffe | 45 | typedef enum PmInterpCtrl_e |
| dadaista | 0:14e5e829dffe | 46 | { |
| dadaista | 0:14e5e829dffe | 47 | /* other erroneous exits go here with negative values */ |
| dadaista | 0:14e5e829dffe | 48 | INTERP_CTRL_ERR = -1, /**< Generic error causes exit */ |
| dadaista | 0:14e5e829dffe | 49 | INTERP_CTRL_EXIT = 0, /**< Normal execution exit */ |
| dadaista | 0:14e5e829dffe | 50 | INTERP_CTRL_CONT = 1, /**< Continue interpreting */ |
| dadaista | 0:14e5e829dffe | 51 | INTERP_CTRL_RESCHED = 2 /**< Reschedule threads */ |
| dadaista | 0:14e5e829dffe | 52 | /* all positive values indicate "continue interpreting" */ |
| dadaista | 0:14e5e829dffe | 53 | } PmInterpCtrl_t, *pPmInterpCtrl_t; |
| dadaista | 0:14e5e829dffe | 54 | |
| dadaista | 0:14e5e829dffe | 55 | /** |
| dadaista | 0:14e5e829dffe | 56 | * Thread obj |
| dadaista | 0:14e5e829dffe | 57 | * |
| dadaista | 0:14e5e829dffe | 58 | */ |
| dadaista | 0:14e5e829dffe | 59 | typedef struct PmThread_s |
| dadaista | 0:14e5e829dffe | 60 | { |
| dadaista | 0:14e5e829dffe | 61 | /** object descriptor */ |
| dadaista | 0:14e5e829dffe | 62 | PmObjDesc_t od; |
| dadaista | 0:14e5e829dffe | 63 | |
| dadaista | 0:14e5e829dffe | 64 | /** current frame pointer */ |
| dadaista | 0:14e5e829dffe | 65 | pPmFrame_t pframe; |
| dadaista | 0:14e5e829dffe | 66 | |
| dadaista | 0:14e5e829dffe | 67 | /** |
| dadaista | 0:14e5e829dffe | 68 | * Interpreter loop control value |
| dadaista | 0:14e5e829dffe | 69 | * |
| dadaista | 0:14e5e829dffe | 70 | * A positive value means continue interpreting. |
| dadaista | 0:14e5e829dffe | 71 | * A zero value means normal interpreter exit. |
| dadaista | 0:14e5e829dffe | 72 | * A negative value signals an error exit. |
| dadaista | 0:14e5e829dffe | 73 | */ |
| dadaista | 0:14e5e829dffe | 74 | PmInterpCtrl_t interpctrl; |
| dadaista | 0:14e5e829dffe | 75 | } PmThread_t, |
| dadaista | 0:14e5e829dffe | 76 | *pPmThread_t; |
| dadaista | 0:14e5e829dffe | 77 | |
| dadaista | 0:14e5e829dffe | 78 | |
| dadaista | 0:14e5e829dffe | 79 | /** |
| dadaista | 0:14e5e829dffe | 80 | * Constructs a thread for a root frame. |
| dadaista | 0:14e5e829dffe | 81 | * |
| dadaista | 0:14e5e829dffe | 82 | * @param pframe Frame object as a basis for this thread. |
| dadaista | 0:14e5e829dffe | 83 | * @param r_pobj Return by reference; Ptr to the newly created thread object. |
| dadaista | 0:14e5e829dffe | 84 | * @return Return status |
| dadaista | 0:14e5e829dffe | 85 | */ |
| dadaista | 0:14e5e829dffe | 86 | PmReturn_t thread_new(pPmObj_t pframe, pPmObj_t *r_pobj); |
| dadaista | 0:14e5e829dffe | 87 | |
| dadaista | 0:14e5e829dffe | 88 | #endif /* __THREAD_H__ */ |