/* * Copyright (c) 2012-2013, Texas Instruments Incorporated * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * * Neither the name of Texas Instruments Incorporated nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*! * @file NameServer.c * * @brief NameServer Manager * */ /* Standard headers */ #include /* Qnx specific header files */ #include /* Socket Headers */ #include #include #include #include #include #include #include #include #include #include #include #include /* Module level headers */ #include #include #include <_MultiProc.h> #include /* Internal stuff: */ #include <_MessageQCopy.h> #include <_MessageQCopyDefs.h> #include <_NameServer.h> #include <_NameServerRemoteRpmsg.h> #include <_IpcLog.h> /* TI Ipc utils: */ #include #include "ti/ipc/ti_ipc.h" #define MESSAGEQ_RPMSG_PORT 61 #define NAME_SERVER_RPMSG_ADDR 0 #define RPMSG_RESERVED_ADDRESSES (1024) #define INVALIDSOCKET (-1) #if defined (__cplusplus) extern "C" { #endif /* ============================================================================= * Structures & Enums * ============================================================================= */ /* Structure of entry in Name/Value table */ typedef struct NameServer_TableEntry_tag { CIRCLEQ_ENTRY(NameServer_TableEntry_tag) elem; /* List element */ UInt32 hash; /* Hash value */ String name; /* Name portion of the name/value pair. */ UInt len; /* Length of the value field. */ Ptr value; /* Value portion of the name/value entry. */ Bool collide; /* Does the hash collide? */ struct NameServer_TableEntry_tag * next; /* Pointer to the next entry, used incase of collision only */ } NameServer_TableEntry; /* Structure defining object for the NameServer */ struct NameServer_Object { CIRCLEQ_ENTRY(NameServer_Object) elem; CIRCLEQ_HEAD(dummy2, NameServer_TableEntry_tag) nameList; String name; /* name of the instance */ NameServer_Params params; /* the parameter structure */ UInt32 count; /* count of entries */ pthread_mutex_t gate; /* crit sect gate */ } NameServer_Object; /* structure for NameServer module state */ typedef struct NameServer_ModuleObject { CIRCLEQ_HEAD(dummy1, NameServer_Object) objList; Int32 refCount; MessageQCopy_Handle mq; /* MessageQCopy instance to receive from remote proc nameserver ports: */ UInt32 recvAddr; /* Local endpoint for receiving from remote proc nameserver ports: */ pthread_t listener; /* Listener thread for NameServer replies and requests. */ int waitFdW; int waitFdR; /* Pipe to post to NameServer_get. */ NameServerMsg nsMsg; /* NameServer Message cache. */ NameServer_Params defInstParams; /* Default instance paramters */ pthread_mutex_t modGate; } NameServer_ModuleObject; #define CIRCLEQ_destruct(head) { \ (head)->cqh_first = NULL; \ (head)->cqh_last = NULL; \ } #define CIRCLEQ_elemClear(elem) { \ (elem)->cqe_next = (elem)->cqe_prev = (Void *)(elem); \ } #define CIRCLEQ_traverse(x, y, tag) \ for (x = (y)->cqh_first; x != (struct tag *)(y); x = x->elem.cqe_next) /* ============================================================================= * Globals * ============================================================================= */ /* * NameServer_state * * Make the module gate "recursive" since NameServer_getHandle() needs to * use it and NameServer_create() needs to hold it around its call to * NameServer_getHandle(). Also, use the static initializer instead of a * run-time init call, so we can use this gate immediately in _setup(). */ static NameServer_ModuleObject NameServer_state = { .defInstParams.maxRuntimeEntries = 0u, .defInstParams.tableHeap = NULL, .defInstParams.checkExisting = TRUE, .defInstParams.maxValueLen = 0u, .defInstParams.maxNameLen = 16u, // .modGate = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP, .modGate = PTHREAD_RMUTEX_INITIALIZER, .refCount = 0 }; static NameServer_ModuleObject * NameServer_module = &NameServer_state; static const UInt32 stringCrcTab[256u] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, }; static UInt32 stringHash(String s) { UInt32 hash = strlen(s); UInt32 i; for (i = 0; i < strlen(s); i++) { hash = (hash >> 8u) ^ stringCrcTab[(hash & 0xff)] ^ s[i]; } return (hash); } static void NameServerRemote_processMessage(NameServerMsg * msg, UInt16 procId) { NameServer_Handle handle; Int status = NameServer_E_FAIL; char buf = 'n'; int numBytes; int waitFd = NameServer_module->waitFdW; if (msg->request == NAMESERVER_REQUEST) { LOG2("NameServer Request: instanceName: %s, name: %s\n", (String)msg->instanceName, (String)msg->name) /* * Message is a request. Lookup name in NameServer table. * Send a response message back to source processor. */ handle = NameServer_getHandle((String)msg->instanceName); if (handle != NULL) { /* Search for the NameServer entry */ LOG0("Calling NameServer_getLocalUInt32...\n") status = NameServer_getLocalUInt32(handle, (String)msg->name, &msg->value); } LOG2("NameServer Response: instanceName: %s, name: %s,", (String)msg->instanceName, (String)msg->name) /* set the request status */ if (status < 0) { LOG1(" Value not found, status: %d\n", status) msg->requestStatus = 0; } else { msg->requestStatus = 1; LOG1(" Value: 0x%x\n", msg->value) } /* specify message as a response */ msg->request = NAMESERVER_RESPONSE; msg->reserved = NAMESERVER_MSG_TOKEN; /* send response message to remote processor */ status = MessageQCopy_send(procId, MultiProc_self(), MESSAGEQ_RPMSG_PORT, RPMSG_RESERVED_ADDRESSES, msg, sizeof(NameServerMsg), TRUE); if (status < 0) { LOG0("NameServer: MessageQCopy_send failed\n") } } else { LOG2("NameServer Reply: instanceName: %s, name: %s", (String)msg->instanceName, (String)msg->name) LOG1(", value: 0x%x\n", msg->value) /* Save the response message. */ memcpy(&NameServer_module->nsMsg, msg, sizeof(NameServerMsg)); /* Post the eventfd upon which NameServer_get() is waiting */ numBytes = write(waitFd, &buf, sizeof(buf)); } } static Void _listener_cb(MessageQCopy_Handle handle, void * data, int len, void * priv, UInt32 src, UInt16 srcProc) { NameServerMsg msg; LOG0("listener_cb: Entered Listener thread.\n") LOG1("NameServer: Listener got NameServer message " "from MessageQCopy: 0x%x!\n", handle); /* Get NameServer message and process: */ memcpy(&msg, data, len); if (len != sizeof(NameServerMsg)) { LOG1("NameServer: got bad NameServerMsg len (%d)\n", len) } else { LOG1("listener_cb: read from MessageQCopy 0x%x\n", handle) LOG2("\tReceived ns msg: byte count: %d, from addr: %d, ", len, src) LOG1("from vproc: %d\n", srcProc) NameServerRemote_processMessage(&msg, srcProc); } } /* ============================================================================= * APIS * ============================================================================= */ /* Function to setup the nameserver module. */ Int NameServer_setup(Void) { Int status = NameServer_S_SUCCESS; UInt16 numProcs; int fd[2]; pthread_mutex_lock(&NameServer_module->modGate); LOG1("NameServer_setup: entered, refCount=%d\n", NameServer_module->refCount) NameServer_module->refCount++; if (NameServer_module->refCount > 1) { LOG0("NameServer_setup: already setup\n") status = NameServer_S_ALREADYSETUP; goto exit; } numProcs = MultiProc_getNumProcessors(); if (pipe(fd) == -1) { status = NameServer_E_FAIL; LOG0("NameServer_setup: failed to create waitFd.\n") goto exit; } NameServer_module->waitFdW = fd[1]; NameServer_module->waitFdR = fd[0]; /* Create the MessageQCopy for receiving messages from all remote proc */ NameServer_module->mq = MessageQCopy_create(NAME_SERVER_RPMSG_ADDR, NULL, _listener_cb, NULL, &NameServer_module->recvAddr); if (NameServer_module->mq == NULL) { status = NameServer_E_FAIL; LOG0("NameServer_setup: failed to create MessageQCopy instance.\n") goto exit; } /* Construct the list object */ CIRCLEQ_INIT(&NameServer_module->objList); exit: LOG1("NameServer_setup: exiting, refCount=%d\n", \ NameServer_module->refCount) pthread_mutex_unlock(&NameServer_module->modGate); return (status); } /*! Function to destroy the nameserver module. */ Int NameServer_destroy(void) { Int status = NameServer_S_SUCCESS; pthread_mutex_lock(&NameServer_module->modGate); LOG1("NameServer_destroy: entered, refCount=%d\n", NameServer_module->refCount) NameServer_module->refCount--; if (NameServer_module->refCount > 0) { LOG1("NameServer_destroy(): refCount(%d) > 0, exiting\n", NameServer_module->refCount) status = NameServer_S_SUCCESS; goto exit; } /* Delete the MessageQCopy instances */ if (NameServer_module->mq != NULL) { MessageQCopy_delete(&NameServer_module->mq); } CIRCLEQ_destruct(&NameServer_module->objList); close(NameServer_module->waitFdW); close(NameServer_module->waitFdR); exit: LOG1("NameServer_destroy: exiting, refCount=%d\n", NameServer_module->refCount) pthread_mutex_unlock(&NameServer_module->modGate); return (status); } /* Function to retrieve a NameServer handle from name. */ NameServer_Handle NameServer_getHandle(String name) { NameServer_Handle handle = NULL; Bool found = FALSE; struct NameServer_Object * elem; assert(name != NULL); assert(NameServer_module->refCount != 0); pthread_mutex_lock(&NameServer_module->modGate); /* Lookup handle from name: */ CIRCLEQ_traverse(elem, &NameServer_module->objList, NameServer_Object) { handle = (NameServer_Handle) elem; if (strcmp(handle->name, name) == 0) { found = TRUE; break; } } if (found == FALSE) { handle = NULL; } pthread_mutex_unlock(&NameServer_module->modGate); return (handle); } /* Function to create a name server. */ NameServer_Handle NameServer_create(String name, const NameServer_Params * params) { NameServer_Handle handle = NULL; pthread_mutexattr_t mutex_attr; assert(params != NULL); assert(name != NULL); assert(NameServer_module->refCount != 0); LOG1("NameServer_create(): '%s'\n", name) pthread_mutex_lock(&NameServer_module->modGate); if (params->maxValueLen > sizeof(UInt32)) { LOG1("NameServer_create: params->maxValueLen (%d) too big for now\n", params->maxValueLen) /* Can't handle more than UInt32 at this time: */ goto leave; } /* check if the name is already created or not */ if (NameServer_getHandle(name)) { LOG0("NameServer_create NameServer_E_INVALIDARG Name is in use!\n") handle = NULL; goto leave; } else { handle = (NameServer_Handle)calloc(1, sizeof(NameServer_Object)); } if (!handle) { LOG0("NameServer_create: NameServer_Handle alloc failed\n") goto leave; } handle->name = (String)malloc(strlen(name) + 1u); if (!handle->name) { LOG0("NameServer_create: instance name alloc failed\n") goto cleanup; } strncpy(handle->name, name, strlen (name) + 1u); memcpy((Ptr) &handle->params, (Ptr) params, sizeof(NameServer_Params)); if (params->maxValueLen < sizeof(UInt32)) { handle->params.maxValueLen = sizeof(UInt32); } else { handle->params.maxValueLen = params->maxValueLen; } CIRCLEQ_INIT(&handle->nameList); handle->count = 0u; /* Put in the local list */ CIRCLEQ_elemClear(&handle->elem); CIRCLEQ_INSERT_HEAD(&NameServer_module->objList, handle, elem); /* * NameServer_removeEntry() enters gate and is called by * NameServer_remove() while holding the gate. */ pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE); pthread_mutex_init(&handle->gate, &mutex_attr); goto leave; cleanup: free(handle); handle = NULL; leave: pthread_mutex_unlock(&NameServer_module->modGate); return (handle); } /* Function to delete a name server. */ Int NameServer_delete(NameServer_Handle * handle) { Int status = NameServer_S_SUCCESS; assert(handle != NULL); assert(*handle != NULL); assert((*handle)->count == 0); assert(NameServer_module->refCount != 0); pthread_mutex_lock(&NameServer_module->modGate); if ((*handle)->count == 0) { CIRCLEQ_REMOVE(&NameServer_module->objList, *handle, elem); if ((*handle)->name != NULL) { free((*handle)->name); (*handle)->name = NULL; } CIRCLEQ_destruct(&(*handle)->nameList); free((*handle)); (*handle) = NULL; } pthread_mutex_unlock(&NameServer_module->modGate); return (status); } /* Adds a variable length value into the local NameServer table */ Ptr NameServer_add(NameServer_Handle handle, String name, Ptr buf, UInt len) { Int status = NameServer_S_SUCCESS; NameServer_TableEntry * node = NULL; NameServer_TableEntry * new_node = NULL; Bool found = FALSE; UInt32 hash; assert(handle != NULL); assert(name != NULL); assert(buf != NULL); assert(len != 0); assert(NameServer_module->refCount != 0); /* Calculate the hash */ hash = stringHash(name); pthread_mutex_lock(&handle->gate); /* Traverse the list to find duplicate check */ CIRCLEQ_traverse(node, &handle->nameList, NameServer_TableEntry_tag) { /* Hash matches */ if (node->hash == hash) { /* If the name matches, incase hash is duplicate */ if (strcmp(node->name, name) == 0) { if (handle->params.checkExisting == TRUE) { status = NameServer_E_INVALIDARG; LOG1("NameServer_add: '%s' - duplicate entry found!\n", name) break; } } else { found = TRUE; break; } /* name does not match */ } /* hash does not match */ } /* CIRCLEQ_traverse */ if (status != NameServer_S_SUCCESS) { new_node = NULL; goto exit; } /* Now add the new entry. */ new_node = (NameServer_TableEntry *)malloc(sizeof(NameServer_TableEntry)); if (new_node == NULL) { status = NameServer_E_MEMORY; LOG1("NameServer_add: %d - malloc new_node failed!\n", status) goto exit; } new_node->hash = hash; new_node->collide = found; /* Indicate if there is a collision*/ new_node->len = len; new_node->next = NULL; new_node->name = (String)malloc(strlen(name) + 1u); new_node->value = (Ptr)malloc(len); strncpy(new_node->name, name, strlen(name) + 1u); memcpy((Ptr)new_node->value, (Ptr)buf, len); if (found == TRUE) { /* If hash is found, need to stitch the list to link the * new node to the existing node with the same hash. */ new_node->next = node->next; node->next = new_node; } else { /* put the new node into the list */ CIRCLEQ_INSERT_HEAD(&handle->nameList, new_node, elem); } handle->count++; LOG2("NameServer_add: Entered key: '%s', data: 0x%x\n", name, *(UInt32 *)buf) exit: pthread_mutex_unlock(&handle->gate); return (new_node); } /* Function to add a UInt32 value into a name server. */ Ptr NameServer_addUInt32(NameServer_Handle handle, String name, UInt32 value) { Ptr entry = NULL; assert(handle != NULL); assert(name != NULL); assert(NameServer_module->refCount != 0); entry = NameServer_add(handle, name, &value, sizeof(UInt32)); return (entry); } /* Function to remove a name/value pair from a name server. */ Int NameServer_remove(NameServer_Handle handle, String name) { Int status = NameServer_S_SUCCESS; NameServer_TableEntry *prev = NULL; NameServer_TableEntry *temp = NULL; NameServer_TableEntry *node = NULL; Bool done = FALSE; UInt32 hash; assert(handle != NULL); assert(name != NULL); assert(NameServer_module->refCount != 0); /* Calculate the hash */ hash = stringHash(name); pthread_mutex_lock(&handle->gate); /* Traverse the list to find duplicate check */ CIRCLEQ_traverse(node, &handle->nameList, NameServer_TableEntry_tag) { /* Hash matchs */ if (node->hash == hash) { if (node->collide == TRUE) { if (strcmp(node->name, name) == 0){ free(node->value); free(node->name); memcpy((Ptr)node, (Ptr) node->next, sizeof(NameServer_TableEntry)); node->next = node->next->next; free(node->next); handle->count--; done = TRUE; break; } else { prev = node; temp = node->next; while (temp) { if (strcmp(temp->name, name) == 0){ free(temp->value); free(temp->name); prev->next = temp->next; free(temp); handle->count--; done = TRUE; break; } temp = temp->next; } break; } } else { NameServer_removeEntry(handle, (Ptr)node); done = TRUE; break; } } } if (done == FALSE) { status = NameServer_E_INVALIDARG; LOG1("NameServer_remove %d Entry not found!\n", status) } pthread_mutex_unlock(&handle->gate); return (status); } /* Function to remove a name/value pair from a name server. */ Int NameServer_removeEntry(NameServer_Handle handle, Ptr entry) { Int status = NameServer_S_SUCCESS; NameServer_TableEntry * node; assert(handle != NULL); assert(entry != NULL); assert(NameServer_module->refCount != 0); pthread_mutex_lock(&handle->gate); node = (NameServer_TableEntry *)entry; free(node->value); free(node->name); CIRCLEQ_REMOVE(&handle->nameList, node, elem); free(node); handle->count--; pthread_mutex_unlock(&handle->gate); return (status); } /* Initialize this config-params structure with supplier-specified * defaults before instance creation. */ Void NameServer_Params_init(NameServer_Params * params) { assert(params != NULL); memcpy(params, &(NameServer_module->defInstParams), sizeof (NameServer_Params)); } Int NameServer_getRemote(NameServer_Handle handle, String name, Ptr value, UInt32 * len, UInt16 procId) { Int status = NameServer_S_SUCCESS; Int mqcStatus = -1; struct NameServer_Object *obj = (struct NameServer_Object *)(handle); NameServerMsg nsMsg; NameServerMsg *replyMsg; fd_set rfds; int ret = 0, maxfd, waitFd; struct timeval tv; char buf = '1'; int numBytes; pthread_mutex_lock(&NameServer_module->modGate); /* Set Timeout to wait: */ tv.tv_sec = NAMESERVER_GET_TIMEOUT; tv.tv_usec = 0; /* Create request message and send to remote processor: */ nsMsg.reserved = NAMESERVER_MSG_TOKEN; nsMsg.request = NAMESERVER_REQUEST; nsMsg.requestStatus = 0; strncpy((char *)nsMsg.instanceName, obj->name, strlen(obj->name) + 1); strncpy((char *)nsMsg.name, name, strlen(name) + 1); LOG2("NameServer_getRemote: Requesting from procId %d, %s:", procId, (String)nsMsg.instanceName) LOG1("%s...\n", (String)nsMsg.name) /* send message */ mqcStatus = MessageQCopy_send(procId, MultiProc_self(), MESSAGEQ_RPMSG_PORT, RPMSG_RESERVED_ADDRESSES, &nsMsg, sizeof(NameServerMsg), TRUE); if (mqcStatus < 0) { LOG0("NameServer_getRemote: Can't send to remote endpoint\n") status = NameServer_E_FAIL; goto exit; } /* Block on waitFd for signal from listener thread: */ waitFd = NameServer_module->waitFdR; FD_ZERO(&rfds); FD_SET(waitFd, &rfds); maxfd = waitFd + 1; LOG1("NameServer_getRemote: pending on waitFd: %d\n", waitFd) ret = select(maxfd, &rfds, NULL, NULL, &tv); if (ret == -1) { LOG0("NameServer_getRemote: select failed.") status = NameServer_E_FAIL; goto exit; } else if (!ret) { LOG0("NameServer_getRemote: select timed out.\n") status = NameServer_E_TIMEOUT; goto exit; } if (FD_ISSET(waitFd, &rfds)) { /* Read, just to balance the write: */ numBytes = read(waitFd, &buf, sizeof(buf)); /* Process response: */ replyMsg = &NameServer_module->nsMsg; if (replyMsg->requestStatus) { /* name is found */ /* set the contents of value */ *(UInt32 *)value = (UInt32)replyMsg->value; LOG2("NameServer_getRemote: Reply from: %d, %s:", procId, (String)replyMsg->instanceName) LOG2("%s, value: 0x%x...\n", (String)replyMsg->name, *(UInt32 *)value) goto exit; } else { /* name is not found */ LOG2("NameServer_getRemote: value for %s:%s not found.\n", (String)replyMsg->instanceName, (String)replyMsg->name) /* set status to not found */ status = NameServer_E_NOTFOUND; } } exit: pthread_mutex_unlock(&NameServer_module->modGate); return (status); } /* Function to retrieve the value portion of a name/value pair from * local table. */ Int NameServer_get(NameServer_Handle handle, String name, Ptr value, UInt32 * len, UInt16 procId[]) { Int status = NameServer_S_SUCCESS; UInt16 numProcs = MultiProc_getNumProcessors(); UInt32 i; if (procId == NULL) { status = NameServer_getLocal(handle, name, value, len); if (status == NameServer_E_NOTFOUND) { for (i = 0; i < numProcs; i++) { /* getLocal call already covers "self", keep going */ if (i == MultiProc_self()) { continue; } status = NameServer_getRemote(handle, name, value, len, i); if ((status >= 0) || ((status < 0) && (status != NameServer_E_NOTFOUND))) { break; } } } } else { /* * Search the query list. It might contain the local proc * somewhere in the list. */ i = 0; while (procId[i] != MultiProc_INVALIDID) { if (procId[i] == MultiProc_self()) { status = NameServer_getLocal(handle, name, value, len); } else { status = NameServer_getRemote(handle, name, value, len, i); } if ((status >= 0) || ((status < 0) && (status != NameServer_E_NOTFOUND))) { break; } i++; } } return (status); } /* Gets a 32-bit value by name */ Int NameServer_getUInt32(NameServer_Handle handle, String name, Ptr value, UInt16 procId[]) { Int status; UInt32 len = sizeof(UInt32); assert(handle != NULL); assert(name != NULL); assert(value != NULL); assert(NameServer_module->refCount != 0); status = NameServer_get(handle, name, value, &len, procId); return (status); } /* Function to Retrieve the value portion of a name/value pair from * local table. */ Int NameServer_getLocal(NameServer_Handle handle, String name, Ptr value, UInt32 * len) { Int status = NameServer_E_NOTFOUND; NameServer_TableEntry * node = NULL; NameServer_TableEntry * temp = NULL; Bool done = FALSE; UInt32 length; UInt32 hash; assert(handle != NULL); assert(name != NULL); assert(value != NULL); assert(len != NULL); assert(NameServer_module->refCount != 0); length = *len; /* Calculate the hash */ hash = stringHash(name); pthread_mutex_lock(&handle->gate); /* Traverse the list to find duplicate check */ CIRCLEQ_traverse(node, &handle->nameList, NameServer_TableEntry_tag) { if (node->hash == hash) { if (node->collide == TRUE) { temp = node; while (temp) { if (strcmp(temp->name, name) == 0u){ if (length <= node->len) { memcpy(value, node->value, length); *len = length; } else { memcpy(value, node->value, node->len); *len = node->len; } done = TRUE; break; } temp = temp->next; } break; } else { if (length <= node->len) { memcpy(value, node->value, length); *len = length; } else { memcpy(value, node->value, node->len); *len = node->len; } done = TRUE; break; } } } pthread_mutex_unlock(&handle->gate); if (done == FALSE) { LOG1("NameServer_getLocal: entry key: '%s' not found!\n", name) } else { LOG2("NameServer_getLocal: Found entry key: '%s', data: 0x%x\n", node->name, (UInt32)node->value) status = NameServer_S_SUCCESS; } return (status); } /* * Gets a 32-bit value by name from the local table * * If the name is found, the 32-bit value is copied into the value * argument and a success status is returned. * * If the name is not found, zero is returned in len and the contents * of value are not modified. Not finding a name is not considered * an error. * * This function only searches the local name/value table. * */ Int NameServer_getLocalUInt32(NameServer_Handle handle, String name, Ptr value) { Int status; UInt32 len = sizeof(UInt32); assert(handle != NULL); assert(name != NULL); assert(value != NULL); assert(NameServer_module->refCount != 0); LOG0("NameServer_getLocalUInt32: calling NameServer_getLocal()...\n") status = NameServer_getLocal(handle, name, value, &len); return (status); } #if defined (__cplusplus) } #endif /* defined (__cplusplus) */