From 73efecca42dbc44200e797e02f8c1e24fcff26ef Mon Sep 17 00:00:00 2001 From: Sebastiano Tronto Date: Thu, 5 Jun 2025 10:13:28 +0200 Subject: Added two more examples --- 04_no_block/build.sh | 6 ++++++ 04_no_block/index.html | 19 +++++++++++++++++ 04_no_block/mime.txt | 1 + 04_no_block/primes.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++ 04_no_block/run-server.sh | 6 ++++++ 04_no_block/script.mjs | 14 +++++++++++++ 04_no_block/worker.mjs | 8 +++++++ 7 files changed, 107 insertions(+) create mode 100755 04_no_block/build.sh create mode 100644 04_no_block/index.html create mode 100644 04_no_block/mime.txt create mode 100644 04_no_block/primes.c create mode 100755 04_no_block/run-server.sh create mode 100644 04_no_block/script.mjs create mode 100644 04_no_block/worker.mjs (limited to '04_no_block') diff --git a/04_no_block/build.sh b/04_no_block/build.sh new file mode 100755 index 0000000..2f08909 --- /dev/null +++ b/04_no_block/build.sh @@ -0,0 +1,6 @@ +#!/bin/sh + +mkdir -p build +emcc -sEXPORTED_FUNCTIONS=_primes_in_range -sMODULARIZE -sEXPORT_NAME=Primes \ + -pthread -sPTHREAD_POOL_SIZE=16 \ + -o build/primes.mjs primes.c diff --git a/04_no_block/index.html b/04_no_block/index.html new file mode 100644 index 0000000..7a1fba7 --- /dev/null +++ b/04_no_block/index.html @@ -0,0 +1,19 @@ + + + + + + Primes in a range + + + + +
+ x
+
+
+
+

+ + + diff --git a/04_no_block/mime.txt b/04_no_block/mime.txt new file mode 100644 index 0000000..6a9a425 --- /dev/null +++ b/04_no_block/mime.txt @@ -0,0 +1 @@ +text/javascript mjs diff --git a/04_no_block/primes.c b/04_no_block/primes.c new file mode 100644 index 0000000..a5076c6 --- /dev/null +++ b/04_no_block/primes.c @@ -0,0 +1,53 @@ +#include +#include + +#define NTHREADS 16 + +bool isprime(int); +void *pthread_routine(void *); + +struct interval { int low; int high; int count; }; + +int primes_in_range(int low, int high) { + pthread_t threads[NTHREADS]; + struct interval args[NTHREADS]; + + if (low < 0 || high < low) + return 0; + + int interval_size = (high-low)/NTHREADS + 1; + for (int i = 0; i < NTHREADS; i++) { + args[i].low = low + i*interval_size; + args[i].high = args[i].low + interval_size; + pthread_create(&threads[i], NULL, pthread_routine, &args[i]); + } + + int result = 0; + for (int i = 0; i < NTHREADS; i++) { + pthread_join(threads[i], NULL); + result += args[i].count; + } + + return result; +} + +bool isprime(int n) { + if (n < 2) + return false; + + for (int i = 2; i*i <= n; i++) + if (n % i == 0) + return false; + return true; +} + +void *pthread_routine(void *arg) { + struct interval *interval = arg; + + interval->count = 0; + for (int i = interval->low; i < interval->high; i++) + if (isprime(i)) + interval->count++; + + return NULL; +} diff --git a/04_no_block/run-server.sh b/04_no_block/run-server.sh new file mode 100755 index 0000000..3a526f3 --- /dev/null +++ b/04_no_block/run-server.sh @@ -0,0 +1,6 @@ +#!/bin/sh + +darkhttpd . \ + --mimetypes mime.txt \ + --header 'Cross-Origin-Opener-Policy: same-origin' \ + --header 'Cross-Origin-Embedder-Policy: require-corp' diff --git a/04_no_block/script.mjs b/04_no_block/script.mjs new file mode 100644 index 0000000..b9c27ea --- /dev/null +++ b/04_no_block/script.mjs @@ -0,0 +1,14 @@ +var aInput = document.getElementById("aInput"); +var bInput = document.getElementById("bInput"); +var button = document.getElementById("goButton"); +var resultText = document.getElementById("resultText"); + +var worker = new Worker("./worker.mjs", { type: "module" }); + +button.addEventListener("click", () => worker.postMessage({ + a: Number(aInput.value), + b: Number(bInput.value) +})); + +worker.onmessage = (e) => resultText.innerText = "There are " + + e.data.result + " primes between " + e.data.a + " and " + e.data.b; diff --git a/04_no_block/worker.mjs b/04_no_block/worker.mjs new file mode 100644 index 0000000..6476203 --- /dev/null +++ b/04_no_block/worker.mjs @@ -0,0 +1,8 @@ +import Primes from "./build/primes.mjs"; + +var primes = await Primes(); + +onmessage = (e) => { + const count = primes._primes_in_range(e.data.a, e.data.b); + postMessage({ result: count, a: e.data.a, b: e.data.b }); +}; -- cgit v1.3