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https://github.com/fluencelabs/sqlite
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@ -1,13 +0,0 @@
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#include "allocator.h"
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#include <stdlib.h>
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#define UNUSED(x) (void)(x)
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void *allocate(size_t size) {
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return malloc(size);
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}
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void deallocate(void *ptr, size_t size) {
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UNUSED(size);
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free(ptr);
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}
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@ -1,27 +0,0 @@
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#ifndef C_SDK_ALLOCATOR_H
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#define C_SDK_ALLOCATOR_H
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#include <stddef.h> // for size_t
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/**
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* Allocates a memory region of given size.
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*
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* Used by Wasm VM for byte array passing. Should be exported from module.
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*
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* @param size a size of needed memory region.
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* @return a pointer to allocated memory region.
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*/
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void *allocate(size_t size);
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/**
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* Frees a memory region.
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*
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* Used by Wasm VM for freeing previous memory allocated by `allocate` function.
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* Should be exported from module.
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*
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* @param ptr the pointer to the previously allocated memory region.
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* @param size the size of the previously allocated memory region.
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*/
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void deallocate(void *ptr, size_t size);
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#endif //C_SDK_ALLOCATOR_H
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@ -15,38 +15,48 @@ int init() {
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int g_isInited = 0;
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int g_isInited = 0;
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/**
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* Stores one byte by a given address in the module memory.
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*
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* @param ptr a address where byte should be stored
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* @param value a byte to be stored
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*/
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void store(char *ptr, unsigned char byte) {
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void store(char *ptr, unsigned char byte) {
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*ptr = byte;
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*ptr = byte;
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}
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}
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void sqlite_store(char *ptr, unsigned char byte) {
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/**
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store(ptr, byte);
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* Returns one byte by a given address in the module memory.
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}
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*
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* @param ptr a address at which the needed byte is located
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unsigned char load(const unsigned char *ptr) {
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* @return the byte at the given address
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*/
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unsigned char load(const unsigned char *ptr) {
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return *ptr;
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return *ptr;
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}
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}
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unsigned char sqlite_load(const unsigned char *ptr) {
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/**
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return load(ptr);
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* Allocates a memory region of a given size.
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}
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* Could be used by Wasm execution environments for byte array passing.
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*
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void* allocate(size_t size) {
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* @param size a size of allocated memory region
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* @return a pointer to the allocated memory region
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*/
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void* allocate(size_t size) {
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return malloc(size + 1);
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return malloc(size + 1);
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}
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}
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void* sqlite_allocate(size_t size) {
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/**
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return allocate(size);
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* Frees a memory region.
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}
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* Could be used by Wasm execution environments for freeing previous memory allocated by `allocate` function.
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*
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void deallocate(void *ptr, int size) {
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* @param ptr a pointer to the previously allocated memory region
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* @param size a size of the previously allocated memory region
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*/
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void deallocate(void *ptr, int size) {
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free(ptr);
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free(ptr);
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}
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}
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void sqlite_deallocate(void *ptr, int size) {
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deallocate(ptr, size);
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}
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char *write_response(char *response, int response_size) {
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char *write_response(char *response, int response_size) {
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char *result_response = allocate(response_size + 4);
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char *result_response = allocate(response_size + 4);
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@ -130,7 +140,15 @@ static int captureOutputCallback(void *pArg, int nArg, char **azArg, char **az){
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return 0;
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return 0;
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}
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}
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const char *invoke(char *request, int request_size) {
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/**
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* Executes given SQL request and returns result in as a pointer to the following structure:
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* | result size (4 bytes, le)| result (size bytes) |.
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*
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* @param sql a pointer to the supplied sql request
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* @param length a size of the supplied sql request
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* @return a pointer to the struct contains result_size and result
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*/
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const char *invoke(char *request, int request_size) {
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if(g_isInited == 0) {
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if(g_isInited == 0) {
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// TODO: check the return code
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// TODO: check the return code
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init();
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init();
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@ -143,12 +161,13 @@ const char *invoke(char *request, int request_size) {
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g_isInited = 1;
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g_isInited = 1;
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}
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}
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request[request_size] = 0;
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request[request_size] = '\n';
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#ifdef ENABLE_LOG
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#ifdef ENABLE_LOG
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wasm_log(request, request_size);
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wasm_log(request, request_size);
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wasm_log("\n", 1);
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#endif
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#endif
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request[request_size] = 0;
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ShellText str;
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ShellText str;
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initText(&str);
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initText(&str);
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char *errorMessage = 0;
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char *errorMessage = 0;
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@ -175,6 +194,24 @@ const char *invoke(char *request, int request_size) {
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return response;
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return response;
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}
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}
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// these functions are needed to support Rust backends
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// (https://github.com/rust-lang/rust/issues/63562)
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const char *sqlite_invoke(char *request, int request_size) {
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const char *sqlite_invoke(char *request, int request_size) {
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return invoke(request, request_size);
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return invoke(request, request_size);
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}
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}
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void* sqlite_allocate(size_t size) {
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return allocate(size);
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}
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void sqlite_deallocate(void *ptr, int size) {
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deallocate(ptr, size);
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}
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void sqlite_store(char *ptr, unsigned char byte) {
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store(ptr, byte);
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}
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unsigned char sqlite_load(const unsigned char *ptr) {
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return load(ptr);
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}
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