Peculiar warnings at C - c

Question

In my project I have these 2 files. When I try to compile it a get some peculiar warnings that I cannot solve, though my program runs fine. I use the -Wall and -Wextra arguments at compile.
//File: DataStructures.h
typedef struct EntryListPacketStruct EntryListPacket;
typedef struct IndexesPacketStruct IndexesPacket;
typedef struct MatchingQueriesResultStruct MatchingQueriesResult;
typedef struct DataPacketStruct* DataPacketPtr;
extern DataPacketPtr Packet;
EntryListPacket* allocateEntryListPacket(void);
void initializeDataPacket(DataPacketPtr);
void freeDataPacket(DataPacketPtr);
void initializeEntryListPacket(EntryListPacket*);
void freeEntryListsPacket(EntryListPacket*);
I include the DataStructures.h in the following file:
//File: DataStructures.c
struct EntryListPacketStruct {
EntryList* exactTypeEntryList;
EntryList** editDistEntryLists;
EntryList** hammingDistEntryLists;
};
struct DataPacketStruct {
struct EntryListPacket* entryLists;
struct IndexesPacket* indexes;
dllistptr matchingQResultList;
};
EntryListPacket* allocateEntryListPacket(void){
EntryListPacket* temp=malloc(sizeof(EntryListPacket));
return temp;
}
void initializeDataPacket(DataPacketPtr packet){
DataPacketPtr temp;
temp=malloc(sizeof(struct DataPacketStruct));
initializeEntryListPacket(temp->entryLists);
initializeIndexesPacket(temp->indexes);
packet=temp;
}
void freeDataPacket(DataPacketPtr packet){
freeEntryListsPacket(packet->entryLists);
freeIndexesPacket(packet->indexes);
free(packet);
}
void initializeEntryListPacket(EntryListPacket* packet) {
packet->exactTypeEntryList = NULL;
packet->editDistEntryLists = malloc(sizeof (EntryList)*22);
int i;
for (i = 0; i < 22; i++) {
packet->editDistEntryLists[i] = NULL;
}
packet->hammingDistEntryLists = malloc(sizeof (EntryList)*27);
for (i = 0; i < 27; i++) {
packet->hammingDistEntryLists[i] = NULL;
}
}
void freeEntryListsPacket(EntryListPacket* packet){
if(packet->exactTypeEntryList!=NULL)
DestroyEntryList(packet->exactTypeEntryList);
free(packet->exactTypeEntryList);
int i;
for(i=0;i<22;i++){
if(packet->editDistEntryLists[i]!=NULL){
printf("%d\n",i);
DestroyEntryList(packet->editDistEntryLists[i]);
}
free(packet->editDistEntryLists[i]);
}
free(packet->editDistEntryLists);
for(i=0;i<27;i++){
if(packet->hammingDistEntryLists[i]!=NULL){
printf("%d\n",i);
DestroyEntryList(packet->hammingDistEntryLists[i]);
}
free(packet->hammingDistEntryLists[i]);
}
free(packet->hammingDistEntryLists);
free(packet);
}
//File:main.c
EntryListPacket *temp;
temp=allocateEntryListPacket();
initializeEntryListPacket(temp);
freeEntryListsPacket(temp);
And I get the following Warnings:
DataStructures.c: In function ‘initializeDataPacket’:
DataStructures.c:48:6: warning: passing argument 1 of ‘initializeEntryListPacket’ from incompatible pointer type [enabled by default]
initializeEntryListPacket(temp->entryLists);
^
In file included from DataStructures.c:6:0:
DataStructures.h:27:10: note: expected ‘struct EntryListPacket *’ but argument is of type ‘struct EntryListPacket *’
void initializeEntryListPacket(EntryListPacket*);
^
DataStructures.c:50:6: warning: passing argument 1 of ‘initializeIndexesPacket’ from incompatible pointer type [enabled by default]
initializeIndexesPacket(temp->indexes);
^
In file included from DataStructures.c:6:0:
DataStructures.h:30:10: note: expected ‘struct IndexesPacket *’ but argument is of type ‘struct IndexesPacket *’
void initializeIndexesPacket(IndexesPacket*);
^
DataStructures.c:43:42: warning: parameter ‘packet’ set but not used [-Wunused-but-set-parameter]
void initializeDataPacket(DataPacketPtr packet){
^
DataStructures.c: In function ‘freeDataPacket’:
DataStructures.c:57:6: warning: passing argument 1 of ‘freeEntryListsPacket’ from incompatible pointer type [enabled by default]
freeEntryListsPacket(packet->entryLists);
^
In file included from DataStructures.c:6:0:
DataStructures.h:28:10: note: expected ‘struct EntryListPacket *’ but argument is of type ‘struct EntryListPacket *’
void freeEntryListsPacket(EntryListPacket*);
^
DataStructures.c:58:6: warning: passing argument 1 of ‘freeIndexesPacket’ from incompatible pointer type [enabled by default]
freeIndexesPacket(packet->indexes);
^
In file included from DataStructures.c:6:0:
DataStructures.h:31:10: note: expected ‘struct IndexesPacket *’ but argument is of type ‘struct IndexesPacket *’
void freeIndexesPacket(IndexesPacket*);
I cannot figure out what I am doing wrong or if the compiler is stuck since this for example: DataStructures.h:28:10: note: expected ‘struct EntryListPacket *’ but argument is of type ‘struct EntryListPacket *’
doesn't seem reasonable to me.
Thx in advance!

Answer 1

Your struct tags include a Struct suffix, but you omitted it when you declared:
struct DataPacketStruct {
struct EntryListPacket* entryLists;
struct IndexesPacket* indexes;
dllistptr matchingQResultList;
};
It should be:
struct DataPacketStruct {
struct EntryListPacketStruct* entryLists;
struct IndexesPacketStruct* indexes;
dllistptr matchingQResultList;
};
Or just:
struct DataPacketStruct {
EntryListPacket* entryLists;
IndexesPacket* indexes;
dllistptr matchingQResultList;
};
Also, your initializeDataPacket function is leaking the memory. Assigning temp to packet doesn't return the value since packet is passed by value, not by reference.

Answer 2

In DataStructures.h, try replacing this:
struct DataPacketStruct {
struct EntryListPacket* entryLists;
...
With this:
struct DataPacketStruct {
EntryListPacket* entryLists;
...
Or this:
struct DataPacketStruct {
struct EntryListPacketStruct* entryLists;
...
And similarly for struct IndexesPacket* indexes;. The compiler warning comes from missing the typedef symbol up with the struct symbol itself.