0,0 → 1,65 |
/* Sending extended well formed messages to FS over |
* standard HelenOS message agrs and over shared buffer. |
*/ |
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/* Methods: |
* send_request: forms and sends extended message to FS |
* unpack_message: unpacks message to given message_params_t* structure |
*/ |
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#include <async.h> |
#include <task.h> |
#include "../fs/fs.h" |
#include "message.h" |
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int send_request(int phoneid, ipcarg_t method, message_params_t *params, void *shared_buffer); |
void unpack_message(message_params_t *message, ipc_call_t m_input, void *shared_buffer); |
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/* This method should be used by all callers of FS. Candidate at library function. */ |
int send_request(int phoneid, ipcarg_t method, message_params_t *params, void *shared_buffer) |
{ |
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int retval, shift; |
size_t size; |
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size = sizeof(message_params_t); |
memset((void *)shared_buffer, 0, size); |
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/* Setting 'buffered' parameters. */ |
memcpy((void* )shared_buffer, (void *)(¶ms->nbytes), sizeof(unsigned int)); |
shift = sizeof(unsigned int); |
memcpy((void *)(shared_buffer + shift), (void *)(¶ms->offset), sizeof(offset_t)); |
shift += sizeof(offset_t); |
memcpy((void *)(shared_buffer + shift), (void *)(¶ms->fname), DIRSIZEX); |
params->fname[DIRSIZEX-1] = '\0'; |
shift += DIRSIZEX * sizeof(char); |
memcpy((void *)(shared_buffer + shift), (void *)(¶ms->entry_number), sizeof(int)); |
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/* 'Most used' parameters will be pass in standart message parameters. */ |
retval = async_req_3(phoneid, method, task_get_id(), params->fd, params->whence, NULL, NULL, NULL); |
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return retval; |
} |
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/* Will be used by FS to unpacking incoming extended message. */ |
void unpack_message(message_params_t *message, ipc_call_t m_input, void *shared_buffer) |
{ |
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int shift; |
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/* Core message parameters. */ |
message->id_task = IPC_GET_ARG1(m_input); |
message->fd = IPC_GET_ARG2(m_input); |
message->whence = IPC_GET_ARG3(m_input); |
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/* Buffered parameters - extended. */ |
memcpy((void *)&message->nbytes, (void *)(shared_buffer), sizeof(unsigned int)); |
shift = sizeof(unsigned int); |
memcpy((void *)(&message->offset), (void *)(shared_buffer + shift), sizeof(offset_t)); |
shift += sizeof(offset_t); |
memcpy((void *)(&message->fname), (void *)(shared_buffer + shift), DIRSIZEX); |
shift += DIRSIZEX * sizeof(char); |
memcpy((void *)(&message->entry_number), (void *)(shared_buffer + shift), sizeof(int)); |
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} |