diff options
Diffstat (limited to 'generic/tclIO.h')
| -rw-r--r-- | generic/tclIO.h | 143 |
1 files changed, 22 insertions, 121 deletions
diff --git a/generic/tclIO.h b/generic/tclIO.h index f7afdc5..1e02749 100644 --- a/generic/tclIO.h +++ b/generic/tclIO.h @@ -9,8 +9,6 @@ * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclIO.h,v 1.9 2005/10/13 00:56:59 dkf Exp $ */ /* @@ -32,32 +30,13 @@ #endif /* - * The following structure encapsulates the state for a background channel - * copy. Note that the data buffer for the copy will be appended to this - * structure. - */ - -typedef struct CopyState { - struct Channel *readPtr; /* Pointer to input channel. */ - struct Channel *writePtr; /* Pointer to output channel. */ - int readFlags; /* Original read channel flags. */ - int writeFlags; /* Original write channel flags. */ - int toRead; /* Number of bytes to copy, or -1. */ - int total; /* Total bytes transferred (written). */ - Tcl_Interp *interp; /* Interp that started the copy. */ - Tcl_Obj *cmdPtr; /* Command to be invoked at completion. */ - int bufSize; /* Size of appended buffer. */ - char buffer[1]; /* Copy buffer, this must be the last - * field. */ -} CopyState; - -/* * struct ChannelBuffer: * * Buffers data being sent to or from a channel. */ typedef struct ChannelBuffer { + int refCount; /* Current uses count */ int nextAdded; /* The next position into which a character * will be put in the buffer. */ int nextRemoved; /* Position of next byte to be removed from @@ -65,13 +44,13 @@ typedef struct ChannelBuffer { int bufLength; /* How big is the buffer? */ struct ChannelBuffer *nextPtr; /* Next buffer in chain. */ - char buf[4]; /* Placeholder for real buffer. The real - * buffer occuppies this space + bufSize-4 + char buf[1]; /* Placeholder for real buffer. The real + * buffer occuppies this space + bufSize-1 * bytes. This must be the last field in the * structure. */ } ChannelBuffer; -#define CHANNELBUFFER_HEADER_SIZE (sizeof(ChannelBuffer) - 4) +#define CHANNELBUFFER_HEADER_SIZE TclOffset(ChannelBuffer, buf) /* * How much extra space to allocate in buffer to hold bytes from previous @@ -88,19 +67,6 @@ typedef struct ChannelBuffer { #define CHANNELBUFFER_DEFAULT_SIZE (1024 * 4) /* - * Structure to record a close callback. One such record exists for each close - * callback registered for a channel. - */ - -typedef struct CloseCallback { - Tcl_CloseProc *proc; /* The procedure to call. */ - ClientData clientData; /* Arbitrary one-word data to pass to the - * callback. */ - struct CloseCallback *nextPtr; - /* For chaining close callbacks. */ -} CloseCallback; - -/* * The following structure describes the information saved from a call to * "fileevent". This is used later when the event being waited for to invoke * the saved script in the interpreter designed in this record. @@ -132,7 +98,7 @@ typedef struct Channel { struct ChannelState *state; /* Split out state information */ ClientData instanceData; /* Instance-specific data provided by creator * of channel. */ - Tcl_ChannelType *typePtr; /* Pointer to channel type structure. */ + const Tcl_ChannelType *typePtr; /* Pointer to channel type structure. */ struct Channel *downChanPtr;/* Refers to channel this one was stacked * upon. This reference is NULL for normal * channels. See Tcl_StackChannel. */ @@ -158,7 +124,7 @@ typedef struct Channel { */ typedef struct ChannelState { - CONST char *channelName; /* The name of the channel instance in Tcl + const char *channelName; /* The name of the channel instance in Tcl * commands. Storage is owned by the generic * IO code, is dynamically allocated. */ int flags; /* ORed combination of the flags defined @@ -197,7 +163,8 @@ typedef struct ChannelState { * value is the POSIX error code. */ int refCount; /* How many interpreters hold references to * this IO channel? */ - CloseCallback *closeCbPtr; /* Callbacks registered to be called when the + struct CloseCallback *closeCbPtr; + /* Callbacks registered to be called when the * channel is closed. */ char *outputStage; /* Temporary staging buffer used when * translating EOL before converting from @@ -219,7 +186,10 @@ typedef struct ChannelState { * handlers ("fileevent") on this channel. */ int bufSize; /* What size buffers to allocate? */ Tcl_TimerToken timer; /* Handle to wakeup timer for this channel. */ - CopyState *csPtr; /* State of background copy, or NULL. */ + struct CopyState *csPtrR; /* State of background copy for which channel + * is input, or NULL. */ + struct CopyState *csPtrW; /* State of background copy for which channel + * is output, or NULL. */ Channel *topChanPtr; /* Refers to topmost channel in a stack. Never * NULL. */ Channel *bottomChanPtr; /* Refers to bottommost channel in a stack. @@ -334,89 +304,20 @@ typedef struct ChannelState { * usable, but it may not be closed * again from within the close * handler. */ +#define CHANNEL_TAINTED (1<<20) /* Channel stack structure has changed. + * Used by Channel Tcl_Obj type to + * determine if we have to revalidate + * the channel. */ +#define CHANNEL_CLOSEDWRITE (1<<21) /* Channel write side has been closed. + * No further Tcl-level write IO on + * the channel is allowed. */ /* - * For each channel handler registered in a call to Tcl_CreateChannelHandler, - * there is one record of the following type. All of records for a specific - * channel are chained together in a singly linked list which is stored in the - * channel structure. - */ - -typedef struct ChannelHandler { - Channel *chanPtr; /* The channel structure for this channel. */ - int mask; /* Mask of desired events. */ - Tcl_ChannelProc *proc; /* Procedure to call in the type of - * Tcl_CreateChannelHandler. */ - ClientData clientData; /* Argument to pass to procedure. */ - struct ChannelHandler *nextPtr; - /* Next one in list of registered handlers. */ -} ChannelHandler; - -/* - * This structure keeps track of the current ChannelHandler being invoked in - * the current invocation of ChannelHandlerEventProc. There is a potential - * problem if a ChannelHandler is deleted while it is the current one, since - * ChannelHandlerEventProc needs to look at the nextPtr field. To handle this - * problem, structures of the type below indicate the next handler to be - * processed for any (recursively nested) dispatches in progress. The - * nextHandlerPtr field is updated if the handler being pointed to is deleted. - * The nextPtr field is used to chain together all recursive invocations, so - * that Tcl_DeleteChannelHandler can find all the recursively nested - * invocations of ChannelHandlerEventProc and compare the handler being - * deleted against the NEXT handler to be invoked in that invocation; when it - * finds such a situation, Tcl_DeleteChannelHandler updates the nextHandlerPtr - * field of the structure to the next handler. - */ - -typedef struct NextChannelHandler { - ChannelHandler *nextHandlerPtr; - /* The next handler to be invoked in this - * invocation. */ - struct NextChannelHandler *nestedHandlerPtr; - /* Next nested invocation of - * ChannelHandlerEventProc. */ -} NextChannelHandler; - -/* - * The following structure describes the event that is added to the Tcl event - * queue by the channel handler check procedure. - */ - -typedef struct ChannelHandlerEvent { - Tcl_Event header; /* Standard header for all events. */ - Channel *chanPtr; /* The channel that is ready. */ - int readyMask; /* Events that have occurred. */ -} ChannelHandlerEvent; - -/* - * The following structure is used by Tcl_GetsObj() to encapsulates the state - * for a "gets" operation. + * The length of time to wait between synthetic timer events. Must be zero or + * bad things tend to happen. */ -typedef struct GetsState { - Tcl_Obj *objPtr; /* The object to which UTF-8 characters will - * be appended. */ - char **dstPtr; /* Pointer into objPtr's string rep where next - * character should be stored. */ - Tcl_Encoding encoding; /* The encoding to use to convert raw bytes to - * UTF-8. */ - ChannelBuffer *bufPtr; /* The current buffer of raw bytes being - * emptied. */ - Tcl_EncodingState state; /* The encoding state just before the last - * external to UTF-8 conversion in - * FilterInputBytes(). */ - int rawRead; /* The number of bytes removed from bufPtr in - * the last call to FilterInputBytes(). */ - int bytesWrote; /* The number of bytes of UTF-8 data appended - * to objPtr during the last call to - * FilterInputBytes(). */ - int charsWrote; /* The corresponding number of UTF-8 - * characters appended to objPtr during the - * last call to FilterInputBytes(). */ - int totalChars; /* The total number of UTF-8 characters - * appended to objPtr so far, just before the - * last call to FilterInputBytes(). */ -} GetsState; +#define SYNTHETIC_EVENT_TIME 0 /* * Local Variables: |