65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <thread>
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#include "flex_scanner.h"
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#include "lemon_parser.h"
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// Based on https://github.com/theory/flex-lemon-example
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// and http://stackoverflow.com/questions/24833465/bison-yacc-vs-lemon-vs-standard-input
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typedef float ResultType;
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void *ParseAlloc(void *(*mallocProc)(size_t));
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void ParseFree(void *p, void (*freeProc)(void*));
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void Parse(void *yyp, int yymajor, const char* text, ResultType*);
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int yylex(void);
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int yylval;
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float parseString(const char* string) {
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yyscan_t scanner;
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yylex_init(&scanner);
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// Scan the provided string
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YY_BUFFER_STATE state = yy_scan_string(string, scanner);
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void* lemonParser = ParseAlloc(malloc);
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int tokenCode;
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ResultType result;
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do {
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tokenCode = yylex(scanner);
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Parse(lemonParser, tokenCode, yyget_text(scanner), &result);
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// printf("Token %d\n", tokenCode);
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} while (tokenCode > 0);
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return result;
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}
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void multithreadTest(int numOfParses, int id) {
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for (int n = 0; n < numOfParses; ++n) {
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int a = rand() % 1000 + 1;
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int b = rand() % 1000 + 1;
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int c = a + b;
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char string[32];
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sprintf(string, "%d + %d", a, b);
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int result = parseString(string);
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if (result != c) printf("Error[%d]! %s != %d\n", id, string, result);
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}
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}
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int main(void) {
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const int numThreads = 10;
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int numRuns = 5000;
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std::thread threads[numThreads];
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for (int n = 0; n < numThreads; ++n) {
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threads[n] = std::thread(multithreadTest, numRuns, n);
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}
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for (int n = 0; n < numThreads; ++n) {
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threads[n].join();
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}
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return 0;
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}
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