Delete bundled copy of NSS and replace with README.

nspr/pr/include/prmwait.h

Index: nspr/pr/include/prmwait.h
diff --git a/nspr/pr/include/prmwait.h b/nspr/pr/include/prmwait.h
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index a902d90ed9fe5c566757567d3e41413f2bbf3b7a..0000000000000000000000000000000000000000
--- a/nspr/pr/include/prmwait.h
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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#if defined(_PRMWAIT_H)
-#else
-#define _PRMWAIT_H
-
-#include "prio.h"
-#include "prtypes.h"
-#include "prclist.h"
-
-PR_BEGIN_EXTERN_C
-
-/********************************************************************************/
-/********************************************************************************/
-/********************************************************************************/
-/******************************       WARNING        ****************************/
-/********************************************************************************/
-/**************************** This is work in progress. *************************/
-/************************** Do not make any assumptions *************************/
-/************************** about the stability of this *************************/
-/************************** API or the underlying imple- ************************/
-/************************** mentation.                   ************************/
-/********************************************************************************/
-/********************************************************************************/
-
-/*
-** STRUCTURE:   PRWaitGroup
-** DESCRIPTION:
-**      The client may define several wait groups in order to semantically
-**      tie a collection of file descriptors for a single purpose. This allows
-**      easier dispatching of threads that returned with active file descriptors
-**      from the wait function.
-*/
-typedef struct PRWaitGroup PRWaitGroup;
-
-/*
-** ENUMERATION: PRMWStatus
-** DESCRIPTION:
-**      This enumeration is used to indicate the completion status of
-**      a receive wait object. Generally stated, a positive value indicates
-**      that the operation is not yet complete. A zero value indicates
-**      success (similar to PR_SUCCESS) and any negative value is an
-**      indication of failure. The reason for the failure can be retrieved
-**      by calling PR_GetError().
-**
-**  PR_MW_PENDING       The operation is still pending. None of the other
-**                      fields of the object are currently valid.
-**  PR_MW_SUCCESS       The operation is complete and it was successful.
-**  PR_MW_FAILURE       The operation failed. The reason for the failure
-**                      can be retrieved by calling PR_GetError().
-**  PR_MW_TIMEOUT       The amount of time allowed for by the object's
-**                      'timeout' field has expired w/o the operation
-**                      otherwise coming to closure.
-**  PR_MW_INTERRUPT     The operation was cancelled, either by the client
-**                      calling PR_CancelWaitFileDesc() or destroying the
-**                      entire wait group (PR_DestroyWaitGroup()).
-*/
-typedef enum PRMWStatus
-{
-    PR_MW_PENDING = 1,
-    PR_MW_SUCCESS = 0,
-    PR_MW_FAILURE = -1,
-    PR_MW_TIMEOUT = -2,
-    PR_MW_INTERRUPT = -3
-} PRMWStatus;
-
-/*
-** STRUCTURE:   PRMemoryDescriptor
-** DESCRIPTION:
-**      THis is a descriptor for an interval of memory. It contains a
-**      pointer to the first byte of that memory and the length (in
-**      bytes) of the interval.
-*/
-typedef struct PRMemoryDescriptor
-{
-    void *start;                /* pointer to first byte of memory */
-    PRSize length;              /* length (in bytes) of memory interval */
-} PRMemoryDescriptor;
-
-/*
-** STRUCTURE:   PRMWaitClientData
-** DESCRIPTION:
-**      An opague stucture for which a client MAY give provide a concrete
-**      definition and associate with a receive descriptor. The NSPR runtime
-**      does not manage this field. It is completely up to the client.
-*/
-typedef struct PRMWaitClientData PRMWaitClientData;
-
-/*
-** STRUCTURE:   PRRecvWait
-** DESCRIPTION:
-**      A receive wait object contains the file descriptor that is subject
-**      to the wait and the amount of time (beginning epoch established
-**      when the object is presented to the runtime) the the channel should
-**      block before abandoning the process.
-**
-**      The success of the wait operation will be noted in the object's
-**      'outcome' field. The fields are not valid when the NSPR runtime
-**      is in possession of the object.
-**
-**      The memory descriptor describes an interval of writable memory
-**      in the caller's address space where data from an initial read
-**      can be placed. The description may indicate a null interval.
-*/
-typedef struct PRRecvWait 
-{
-    PRCList internal;           /* internal runtime linkages */
-
-    PRFileDesc *fd;             /* file descriptor associated w/ object */
-    PRMWStatus outcome;         /* outcome of the current/last operation */
-    PRIntervalTime timeout;     /* time allowed for entire operation */
-
-    PRInt32 bytesRecv;          /* number of bytes transferred into buffer */
-    PRMemoryDescriptor buffer;  /* where to store first segment of input data */
-    PRMWaitClientData *client;  /* pointer to arbitrary client defined data */
-} PRRecvWait;
-
-/*
-** STRUCTURE:   PRMWaitEnumerator
-** DESCRIPTION:
-**      An enumeration object is used to store the state of an existing
-**      enumeration over a wait group. The opaque object must be allocated
-**      by the client and the reference presented on each call to the
-**      pseudo-stateless enumerator. The enumeration objects are sharable
-**      only in serial fashion.
-*/
-typedef struct PRMWaitEnumerator PRMWaitEnumerator;
-
-
-/*
-** FUNCTION:    PR_AddWaitFileDesc
-** DESCRIPTION:
-**      This function will effectively add a file descriptor to the
-**      list of those waiting for network receive. The new descriptor
-**      will be semantically tied to the wait group specified.
-**
-**      The ownership for the storage pointed to by 'desc' is temporarily
-**      passed over the the NSPR runtime. It will be handed back by the
-**      function PR_WaitRecvReady().
-**
-**  INPUTS
-**      group       A reference to a PRWaitGroup or NULL. Wait groups are
-**                  created by calling PR_CreateWaitGroup() and are used
-**                  to semantically group various file descriptors by the
-**                  client's application.
-**      desc        A reference to a valid PRRecvWait. The object of the
-**                  reference must be preserved and not be modified
-**                  until its ownership is returned to the client.
-**  RETURN
-**      PRStatus    An indication of success. If equal to PR_FAILUE details
-**                  of the failure are avaiable via PR_GetError().
-**
-**  ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**                  Invalid 'group' identifier or duplicate 'desc' object.
-**      PR_OUT_OF_MEMORY_ERROR
-**                  Insuffient memory for internal data structures.
-**      PR_INVALID_STATE_ERROR
-**                  The group is being destroyed.
-*/
-NSPR_API(PRStatus) PR_AddWaitFileDesc(PRWaitGroup *group, PRRecvWait *desc);
-
-/*
-** FUNCTION:    PR_WaitRecvReady
-** DESCRIPTION:
-**      PR_WaitRecvReady will block the calling thread until one of the
-**      file descriptors that have been added via PR_AddWaitFileDesc is
-**      available for input I/O.
-**  INPUT
-**      group       A pointer to a valid PRWaitGroup or NULL (the null
-**                  group. The function will block the caller until a
-**                  channel from the wait group becomes ready for receive
-**                  or there is some sort of error.
-**  RETURN
-**      PRReciveWait
-**                  When the caller is resumed it is either returned a
-**                  valid pointer to a previously added receive wait or
-**                  a NULL. If the latter, the function has terminated
-**                  for a reason that can be determined by calling
-**                  PR_GetError().
-**                  If a valid pointer is returned, the reference is to the
-**                  file descriptor contained in the receive wait object.
-**                  The outcome of the wait operation may still fail, and
-**                  if it has, that fact will be noted in the object's
-**                  outcome field. Details can be retrieved from PR_GetError().
-**
-**  ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**                  The 'group' is not known by the runtime.
-**      PR_PENDING_INTERRUPT_ERROR
-                    The thread was interrupted.
-**      PR_INVALID_STATE_ERROR
-**                  The group is being destroyed.
-*/
-NSPR_API(PRRecvWait*) PR_WaitRecvReady(PRWaitGroup *group);
-
-/*
-** FUNCTION:    PR_CancelWaitFileDesc
-** DESCRIPTION:
-**      PR_CancelWaitFileDesc is provided as a means for cancelling operations
-**      on objects previously submitted by use of PR_AddWaitFileDesc(). If
-**      the runtime knows of the object, it will be marked as having failed
-**      because it was interrupted (similar to PR_Interrupt()). The first
-**      available thread waiting on the group will be made to return the
-**      PRRecvWait object with the outcome noted.
-**
-**  INPUTS
-**      group       The wait group under which the wait receive object was
-**                  added.
-**      desc        A pointer to the wait receive object that is to be
-**                  cancelled.
-**  RETURN
-**      PRStatus    If the wait receive object was located and associated
-**                  with the specified wait group, the status returned will
-**                  be PR_SUCCESS. There is still a race condition that would
-**                  permit the offected object to complete normally, but it
-**                  is assured that it will complete in the near future.
-**                  If the receive object or wait group are invalid, the
-**                  function will return with a status of PR_FAILURE.
-**
-**  ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**                  The 'group' argument is not recognized as a valid group.
-**      PR_COLLECTION_EMPTY_ERROR
-**                  There are no more receive wait objects in the group's
-**                  collection.
-**      PR_INVALID_STATE_ERROR
-**                  The group is being destroyed.
-*/
-NSPR_API(PRStatus) PR_CancelWaitFileDesc(PRWaitGroup *group, PRRecvWait *desc);
-
-/*
-** FUNCTION:    PR_CancelWaitGroup
-** DESCRIPTION:
-**      PR_CancelWaitGroup is provided as a means for cancelling operations
-**      on objects previously submitted by use of PR_AddWaitFileDesc(). Each
-**      successive call will return a pointer to a PRRecvWait object that
-**      was previously registered via PR_AddWaitFileDesc(). If no wait
-**      objects are associated with the wait group, a NULL will be returned.
-**      This function should be called in a loop until a NULL is returned
-**      to reclaim all the wait objects prior to calling PR_DestroyWaitGroup().
-**
-**  INPUTS
-**      group       The wait group under which the wait receive object was
-**                  added.
-**  RETURN
-**      PRRecvWait* If the wait group is valid and at least one receive wait
-**                  object is present in the group, that object will be
-**                  marked as PR_MW_INTERRUPT'd and removed from the group's
-**                  queues. Otherwise a NULL will be returned and the reason
-**                  for the NULL may be retrieved by calling PR_GetError().
-**
-**  ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**      PR_GROUP_EMPTY_ERROR
-*/
-NSPR_API(PRRecvWait*) PR_CancelWaitGroup(PRWaitGroup *group);
-
-/*
-** FUNCTION:    PR_CreateWaitGroup
-** DESCRIPTION:
-**      A wait group is an opaque object that a client may create in order
-**      to semantically group various wait requests. Each wait group is
-**      unique, including the default wait group (NULL). A wait request
-**      that was added under a wait group will only be serviced by a caller
-**      that specified the same wait group.
-**
-**  INPUT
-**      size        The size of the hash table to be used to contain the
-**                  receive wait objects. This is just the initial size.
-**                  It will grow as it needs to, but to avoid that hassle
-**                  one can suggest a suitable size initially. It should
-**                  be ~30% larger than the maximum number of receive wait
-**                  objects expected.
-**  RETURN
-**      PRWaitGroup If successful, the function will return a pointer to an
-**                  object that was allocated by and owned by the runtime.
-**                  The reference remains valid until it is explicitly destroyed
-**                  by calling PR_DestroyWaitGroup().
-**
-**  ERRORS
-**      PR_OUT_OF_MEMORY_ERROR
-*/
-NSPR_API(PRWaitGroup*) PR_CreateWaitGroup(PRInt32 size);
-
-/*
-** FUNCTION:    PR_DestroyWaitGroup
-** DESCRIPTION:
-**      Undo the effects of PR_CreateWaitGroup(). Any receive wait operations
-**      on the group will be treated as if the each had been the target of a
-**      PR_CancelWaitFileDesc().
-**
-**  INPUT
-**      group       Reference to a wait group previously allocated using
-**                  PR_CreateWaitGroup().
-**  RETURN
-**      PRStatus    Will be PR_SUCCESS if the wait group was valid and there
-**                  are no receive wait objects in that group. Otherwise
-**                  will indicate PR_FAILURE.
-**
-**  ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**                  The 'group' argument does not reference a known object.
-**      PR_INVALID_STATE_ERROR
-**                  The group still contains receive wait objects.
-*/
-NSPR_API(PRStatus) PR_DestroyWaitGroup(PRWaitGroup *group);
-
-/*
-** FUNCTION:    PR_CreateMWaitEnumerator
-** DESCRIPTION:
-**      The PR_CreateMWaitEnumerator() function returns a reference to an
-**      opaque PRMWaitEnumerator object. The enumerator object is required
-**      as an argument for each successive call in the stateless enumeration
-**      of the indicated wait group.
-**
-**      group       The wait group that the enumeration is intended to
-**                  process. It may be be the default wait group (NULL).
-** RETURN
-**      PRMWaitEnumerator* group
-**                  A reference to an object that will be used to store
-**                  intermediate state of enumerations.
-** ERRORS
-**      Errors are indicated by the function returning a NULL.
-**      PR_INVALID_ARGUMENT_ERROR
-**                  The 'group' argument does not reference a known object.
-**      PR_OUT_OF_MEMORY_ERROR
-*/
-NSPR_API(PRMWaitEnumerator*) PR_CreateMWaitEnumerator(PRWaitGroup *group);
-
-/*
-** FUNCTION:    PR_DestroyMWaitEnumerator
-** DESCRIPTION:
-**      Destroys the object created by PR_CreateMWaitEnumerator(). The reference
-**      used as an argument becomes invalid.
-**
-** INPUT
-**      PRMWaitEnumerator* enumerator
-**          The PRMWaitEnumerator object to destroy.
-** RETURN
-**      PRStatus
-**          PR_SUCCESS if successful, PR_FAILURE otherwise.
-** ERRORS
-**      PR_INVALID_ARGUMENT_ERROR
-**                  The enumerator is invalid.
-*/
-NSPR_API(PRStatus) PR_DestroyMWaitEnumerator(PRMWaitEnumerator* enumerator);
-
-/*
-** FUNCTION:    PR_EnumerateWaitGroup
-** DESCRIPTION:
-**      PR_EnumerateWaitGroup is a thread safe enumerator over a wait group.
-**      Each call to the enumerator must present a valid PRMWaitEnumerator
-**      rererence and a pointer to the "previous" element returned from the
-**      enumeration process or a NULL.
-**
-**      An enumeration is started by passing a NULL as the "previous" value.
-**      Subsequent calls to the enumerator must pass in the result of the
-**      previous call. The enumeration end is signaled by the runtime returning
-**      a NULL as the result.
-**
-**      Modifications to the content of the wait group are allowed during
-**      an enumeration. The effect is that the enumeration may have to be
-**      "reset" and that may result in duplicates being returned from the
-**      enumeration.
-**
-**      An enumeration may be abandoned at any time. The runtime is not
-**      keeping any state, so there are no issues in that regard.
-*/
-NSPR_API(PRRecvWait*) PR_EnumerateWaitGroup(
-    PRMWaitEnumerator *enumerator, const PRRecvWait *previous);
-   
-PR_END_EXTERN_C
-
-#endif /* defined(_PRMWAIT_H) */
-
-/* prmwait.h */