/**************************************************************************/ /* */ /* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com) */ /* Copyright (c) 2008-2014 Oleksandr Shneyder */ /* Copyright (c) 2011-2016 Mike Gabriel */ /* Copyright (c) 2014-2016 Mihai Moldovan */ /* Copyright (c) 2014-2016 Ulrich Sibiller */ /* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com) */ /* */ /* NXAGENT, NX protocol compression and NX extensions to this software */ /* are copyright of the aforementioned persons and companies. */ /* */ /* Redistribution and use of the present software is allowed according */ /* to terms specified in the file LICENSE which comes in the source */ /* distribution. */ /* */ /* All rights reserved. */ /* */ /* NOTE: This software has received contributions from various other */ /* contributors, only the core maintainers and supporters are listed as */ /* copyright holders. Please contact us, if you feel you should be listed */ /* as copyright holder, as well. */ /* */ /**************************************************************************/ /************************************************************ Copyright 1987, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of Digital not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. 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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING, BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of Digital Equipment Corporation shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from Digital Equipment Corporation. ******************************************************************/ /* $TOG: resource.c /main/41 1998/02/09 14:20:31 kaleb $ */ /* Routines to manage various kinds of resources: * * CreateNewResourceType, CreateNewResourceClass, InitClientResources, * FakeClientID, AddResource, FreeResource, FreeClientResources, * FreeAllResources, LookupIDByType, LookupIDByClass, GetXIDRange */ /* * A resource ID is a 32 bit quantity, the upper 2 bits of which are * off-limits for client-visible resources. The next 8 bits are * used as client ID, and the low 22 bits come from the client. * A resource ID is "hashed" by extracting and xoring subfields * (varying with the size of the hash table). * * It is sometimes necessary for the server to create an ID that looks * like it belongs to a client. This ID, however, must not be one * the client actually can create, or we have the potential for conflict. * The 31st bit of the ID is reserved for the server's use for this * purpose. By setting CLIENT_ID(id) to the client, the SERVER_BIT to * 1, and an otherwise arbitrary ID in the low 22 bits, we can create a * resource "owned" by the client. */ #include "../../dix/resource.c" #include "Agent.h" #include "Font.h" #include "Pixmaps.h" #include "GCs.h" #define PANIC #define WARNING #undef TEST #undef DEBUG #ifdef NXAGENT_SERVER static int nxagentResChangedFlag = 0; #endif #ifdef NXAGENT_SERVER int nxagentFindClientResource(int client, RESTYPE type, void * value) { ResourcePtr pResource; ResourcePtr *resources; int i; for (i = 0; i < clientTable[client].buckets; i++) { resources = clientTable[client].resources; for (pResource = resources[i]; pResource; pResource = pResource -> next) { if (pResource -> type == type && pResource -> value == value) { #ifdef TEST fprintf(stderr, "nxagentFindClientResource: Found resource [%p] type [%lu] " "for client [%d].\n", (void *) value, pResource -> type, client); #endif return 1; } } } return 0; } int nxagentSwitchResourceType(int client, RESTYPE type, void * value) { ResourcePtr pResource; ResourcePtr *resources; RESTYPE internalType = 0; int i; if (type == RT_PIXMAP) { internalType = RT_NX_PIXMAP; } else if (type == RT_GC) { internalType = RT_NX_GC; } else if (type == RT_FONT) { internalType = RT_NX_FONT; } else { return 0; } if (client == serverClient -> index) { #ifdef TEST fprintf(stderr, "nxagentSwitchResourceType: Requesting client is [%d]. Skipping the resource switch.\n", client); #endif return 0; } for (i = 0; i < clientTable[serverClient -> index].buckets; i++) { resources = clientTable[serverClient -> index].resources; for (pResource = resources[i]; pResource; pResource = pResource -> next) { if (pResource -> type == internalType && pResource -> value == value) { #ifdef TEST fprintf(stderr, "nxagentSwitchResourceType: Changing resource [%p] type from [%lu] to " "[%lu] for server client [%d].\n", (void *) value, (unsigned long) pResource -> type, (unsigned long) type, serverClient -> index); #endif FreeResource(pResource -> id, RT_NONE); return 1; } } } return 0; } #endif /* NXAGENT_SERVER */ Bool AddResource(XID id, RESTYPE type, void * value) { int client; register ClientResourceRec *rrec; register ResourcePtr res, *head; client = CLIENT_ID(id); rrec = &clientTable[client]; if (!rrec->buckets) { ErrorF("AddResource(%lx, %lx, %lx), client=%d \n", (unsigned long)id, type, (unsigned long)value, client); FatalError("client not in use\n"); } #ifdef NXAGENT_SERVER nxagentSwitchResourceType(client, type, value); #ifdef TEST fprintf(stderr, "AddResource: Adding resource for client [%d] type [%lu] value [%p] id [%lu].\n", client, (unsigned long) type, (void *) value, (unsigned long) id); #endif #endif if ((rrec->elements >= 4*rrec->buckets) && (rrec->hashsize < MAXHASHSIZE)) RebuildTable(client); head = &rrec->resources[Hash(client, id)]; res = (ResourcePtr)malloc(sizeof(ResourceRec)); if (!res) { (*DeleteFuncs[type & TypeMask])(value, id); return FALSE; } res->next = *head; res->id = id; res->type = type; res->value = value; *head = res; rrec->elements++; #ifdef NXAGENT_SERVER nxagentResChangedFlag = 1; #endif if (!(id & SERVER_BIT) && (id >= rrec->expectID)) rrec->expectID = id + 1; return TRUE; } void FreeResource(XID id, RESTYPE skipDeleteFuncType) { int cid; register ResourcePtr res; register ResourcePtr *prev, *head; register int *eltptr; int elements; Bool gotOne = FALSE; #ifdef NXAGENT_SERVER #ifdef TEST fprintf(stderr, "FreeResource: Freeing resource id [%lu].\n", (unsigned long) id); #endif #endif if (((cid = CLIENT_ID(id)) < MAXCLIENTS) && clientTable[cid].buckets) { head = &clientTable[cid].resources[Hash(cid, id)]; eltptr = &clientTable[cid].elements; prev = head; while ( (res = *prev) ) { if (res->id == id) { RESTYPE rtype = res->type; *prev = res->next; elements = --*eltptr; #ifdef NXAGENT_SERVER nxagentResChangedFlag = 1; #endif if (rtype != skipDeleteFuncType) (*DeleteFuncs[rtype & TypeMask])(res->value, res->id); free(res); if (*eltptr != elements) prev = head; /* prev may no longer be valid */ gotOne = TRUE; } else prev = &res->next; } } if (!gotOne) ErrorF("Freeing resource id=%lX which isn't there.\n", (unsigned long)id); } void FreeResourceByType(XID id, RESTYPE type, Bool skipFree) { int cid; register ResourcePtr res; register ResourcePtr *prev, *head; if (((cid = CLIENT_ID(id)) < MAXCLIENTS) && clientTable[cid].buckets) { head = &clientTable[cid].resources[Hash(cid, id)]; prev = head; while ( (res = *prev) ) { if (res->id == id && res->type == type) { *prev = res->next; #ifdef NXAGENT_SERVER nxagentResChangedFlag = 1; #endif if (!skipFree) (*DeleteFuncs[type & TypeMask])(res->value, res->id); free(res); break; } else prev = &res->next; } } } /* Note: if func adds or deletes resources, then func can get called * more than once for some resources. If func adds new resources, * func might or might not get called for them. func cannot both * add and delete an equal number of resources! */ void FindClientResourcesByType( ClientPtr client, RESTYPE type, FindResType func, void * cdata ){ register ResourcePtr *resources; register ResourcePtr this, next; int i, elements; register int *eltptr; #ifdef NXAGENT_SERVER register ResourcePtr **resptr; #endif if (!client) client = serverClient; /* * If func triggers a resource table * rebuild then restart the loop. */ #ifdef NXAGENT_SERVER RestartLoop: #endif resources = clientTable[client->index].resources; #ifdef NXAGENT_SERVER resptr = &clientTable[client->index].resources; #endif eltptr = &clientTable[client->index].elements; for (i = 0; i < clientTable[client->index].buckets; i++) { for (this = resources[i]; this; this = next) { next = this->next; if (!type || this->type == type) { elements = *eltptr; /* * FIXME: * It is not safe to let a function change the resource * table we are reading! */ #ifdef NXAGENT_SERVER nxagentResChangedFlag = 0; #endif (*func)(this->value, this->id, cdata); /* * Avoid that a call to RebuildTable() could invalidate the * pointer. This is safe enough, because in RebuildTable() * the new pointer is allocated just before the old one is * freed, so it can't point to the same address. */ #ifdef NXAGENT_SERVER if (*resptr != resources) goto RestartLoop; #endif /* * It's not enough to check if the number of elements has * changed, because it could happen that the number of * resources that have been added matches the number of * the freed ones. * 'nxagentResChangedFlag' is set if a resource has been * added or freed. */ #ifdef NXAGENT_SERVER if (*eltptr != elements || nxagentResChangedFlag) #else if (*eltptr != elements) #endif next = resources[i]; /* start over */ } } } } void FindAllClientResources( ClientPtr client, FindAllRes func, void * cdata ){ register ResourcePtr *resources; register ResourcePtr this, next; int i, elements; register int *eltptr; #ifdef NXAGENT_SERVER register ResourcePtr **resptr; #endif if (!client) client = serverClient; /* * If func triggers a resource table * rebuild then restart the loop. */ #ifdef NXAGENT_SERVER RestartLoop: #endif resources = clientTable[client->index].resources; #ifdef NXAGENT_SERVER resptr = &clientTable[client->index].resources; #endif eltptr = &clientTable[client->index].elements; for (i = 0; i < clientTable[client->index].buckets; i++) { for (this = resources[i]; this; this = next) { next = this->next; elements = *eltptr; /* * FIXME: * It is not safe to let a function change the resource * table we are reading! */ #ifdef NXAGENT_SERVER nxagentResChangedFlag = 0; #endif (*func)(this->value, this->id, this->type, cdata); /* * Avoid that a call to RebuildTable() could invalidate the * pointer. This is safe enough, because in RebuildTable() * the new pointer is allocated just before the old one is * freed, so it can't point to the same address. */ #ifdef NXAGENT_SERVER if (*resptr != resources) goto RestartLoop; #endif /* * It's not enough to check if the number of elements has * changed, because it could happen that the number of * resources that have been added matches the number of * the freed ones. * 'nxagentResChangedFlag' is set if a resource has been * added or freed. */ #ifdef NXAGENT_SERVER if (*eltptr != elements || nxagentResChangedFlag) #else if (*eltptr != elements) #endif next = resources[i]; /* start over */ } } } void * LookupClientResourceComplex( ClientPtr client, RESTYPE type, FindComplexResType func, void * cdata ){ ResourcePtr *resources; ResourcePtr this; int i; #ifdef NXAGENT_SERVER ResourcePtr **resptr; Bool res; #endif if (!client) client = serverClient; /* * If func triggers a resource table * rebuild then restart the loop. */ #ifdef NXAGENT_SERVER RestartLoop: #endif resources = clientTable[client->index].resources; #ifdef NXAGENT_SERVER resptr = &clientTable[client->index].resources; #endif for (i = 0; i < clientTable[client->index].buckets; i++) { for (this = resources[i]; this; this = this->next) { if (!type || this->type == type) { #ifdef NXAGENT_SERVER res = (*func)(this->value, this->id, cdata); if (*resptr != resources) goto RestartLoop; if (res) return this->value; #else if((*func)(this->value, this->id, cdata)) return this->value; #endif } } } return NULL; }