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-rw-r--r--kernel/exceptions/svc.S12
-rw-r--r--kernel/sys/core.c4
-rw-r--r--kernel/sys/schedule.c22
-rw-r--r--kernel/tests/test.S31
-rw-r--r--kernel/tests/test.c545
5 files changed, 26 insertions, 588 deletions
diff --git a/kernel/exceptions/svc.S b/kernel/exceptions/svc.S
index 75a0cf1..452831a 100644
--- a/kernel/exceptions/svc.S
+++ b/kernel/exceptions/svc.S
@@ -72,9 +72,11 @@ svc_000005: // Release Lock
sev
// Awake any threads waiting for this lock
bl sched_mutex_resurrect
+ cmp r0, #0
+ beq 1f
ldmfd sp!, {r0-r12,lr}
b schedule
- b svc_exit
+1: b svc_exit
svc_000006: // Semaphore decrease
ldr r0, [sp, #0] // struct Semaphore* s
1: clrex
@@ -106,9 +108,11 @@ svc_000007: // Semaphore increase
bne svc_exit
mov r1, #1
bl sched_semaphore_resurrect
+ cmp r0, #0
+ beq 1f
ldmfd sp!, {r0-r12,lr}
b schedule
- b svc_exit
+1: b svc_exit
svc_000008: // Semaphore add #
ldr r0, [sp, #0] // struct Semaphore* s
ldr r3, [sp, #1] // unsigned long # times to increase
@@ -121,9 +125,11 @@ svc_000008: // Semaphore add #
dmb
mov r1, r3
bl sched_semaphore_resurrect
+ cmp r0, #0
+ beq 1f
ldmfd sp!, {r0-r12,lr}
b schedule
- b svc_exit
+1: b svc_exit
svc_000009: // SYS_TIME_2
mrc p15, 0, r0, c9, c13, 0
str r0, [sp, #0]
diff --git a/kernel/sys/core.c b/kernel/sys/core.c
index 4812b00..c06ed4b 100644
--- a/kernel/sys/core.c
+++ b/kernel/sys/core.c
@@ -10,6 +10,7 @@
#include <sys/core.h>
#include <sys/power.h>
#include <sys/schedule.h>
+#include <tests/test.h>
#include <usr/main.h>
#include <util/mutex.h>
#include <util/status.h>
@@ -39,5 +40,6 @@ void sysinit(void)
// Start Scheduler
init_scheduler();
- add_thread(main, 0, 0);
+ add_thread(test_entry, 0, 2);
+ //add_thread(main, 0, 0);
}
diff --git a/kernel/sys/schedule.c b/kernel/sys/schedule.c
index 9b6d46e..3157c5d 100644
--- a/kernel/sys/schedule.c
+++ b/kernel/sys/schedule.c
@@ -418,12 +418,12 @@ void sched_semaphore_yield(void* s)
push_thread_to_queue(rt->value, THREAD_SWAIT, priority);
}
-void sched_mutex_resurrect(void* m)
+unsigned long sched_mutex_resurrect(void* m)
{
// Find any mutex to resurrect
struct Entry* prev = find_mutex_wait_next(m);
if (prev == 0)
- return;
+ return 0;
struct Entry* entry = prev->next;
struct Thread* thread = entry->value;
// Resurrect the thread
@@ -431,7 +431,7 @@ void sched_mutex_resurrect(void* m)
// Remove from wait queue
entry = remove_next_from_queue(prev);
if (entry == 0)
- return;
+ return 1;
// Add to ready queue
push_thread_to_queue(entry->value, THREAD_READY, ((struct Thread*)entry->value)->priority);
// Demote current thread
@@ -445,15 +445,19 @@ void sched_mutex_resurrect(void* m)
((struct Thread*)tentry->value)->old_priority = 0xFF;
prepend_thread_to_queue(tentry->value, THREAD_READY, op);
}
+ return 1;
}
-void sched_semaphore_resurrect(void* s, unsigned long count)
+unsigned long sched_semaphore_resurrect(void* s, unsigned long count)
{
- while (count--) {
+ unsigned long cnt = count;
+ while (cnt) {
// Find any signal/ semaphore to resurrect
struct Entry* prev = find_signal_wait_next(s);
- if (prev == 0)
- return;
+ if (prev == 0 && count == cnt)
+ return 0;
+ else if (prev == 0)
+ return 1;
struct Entry* entry = prev->next;
struct Thread* thread = entry->value;
// Resurrect the thread
@@ -461,8 +465,10 @@ void sched_semaphore_resurrect(void* s, unsigned long count)
// Remove from wait queue
entry = remove_next_from_queue(prev);
if (entry == 0)
- return;
+ return 1;
// Add to ready queue
push_thread_to_queue(entry->value, THREAD_READY, ((struct Thread*)entry->value)->priority);
+ cnt--;
}
+ return 1;
}
diff --git a/kernel/tests/test.S b/kernel/tests/test.S
deleted file mode 100644
index e80b6be..0000000
--- a/kernel/tests/test.S
+++ /dev/null
@@ -1,31 +0,0 @@
-.section .text
-
-a.btest:
- push {lr}
- mov r0, #5
- cmp r0, #4
- pop {pc}
-
-.globl atest
-atest:
- push {lr}
- ldr r0, =a.btest
- mov r1, #0
- mov r2, #0
- bl add_thread
- mov r0, #5
- subs r0, #5
- svc #0
- beq 1f
- mov r0, #0
- mov r1, #11
- mov r2, #0x4E
- mov r3, #0xFF0000
- bl draw_cletter
- pop {pc}
-1: mov r0, #0
- mov r1, #11
- mov r2, #0x59
- mov r3, #0xFF00
- bl draw_cletter
- pop {pc}
diff --git a/kernel/tests/test.c b/kernel/tests/test.c
deleted file mode 100644
index d954ade..0000000
--- a/kernel/tests/test.c
+++ /dev/null
@@ -1,545 +0,0 @@
-#include <cpu.h>
-//#include <drivers/uart.h>
-#include <globals.h>
-#include <graphics/lfb.h>
-#include <lib/kmem.h>
-#include <sys/core.h>
-#include <sys/schedule.h>
-#include <util/lock.h>
-#include <util/mutex.h>
-#include <util/status.h>
-
-extern void atest(void);
-void qualitative_tests(void);
-
-void nooptest(void) {}
-
-void mutex_contention_helper(struct Mutex* m)
-{
- lock_mutex(m);
- sys0(SYS_YIELD);
- unlock_mutex(m);
-}
-
-static int x = 0;
-static int y = 13;
-#define TEST_STR_CLR " "
-#define TEST_RESULT_WIDTH 15
-#define TEST_COUNT 4096
-#define TEST_BIN_COUNT 32
-void test_entry(void)
-{
- x = 0;
- draw_hex32(0, y-1, nextpid);
- draw_string(0, y+4, "Starting tests");
- unsigned long long ti, tf, dt=0,len;
- unsigned int tidx = 0;
- unsigned long bins[TEST_BIN_COUNT];
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- bins[i] = 0;
- }
-
- // Test 1: Trace Time
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sys0_64(SYS_TIME, &ti);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 2: Yield Time
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sys0_64(SYS_TIME, &ti);
- sys0(SYS_YIELD);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 3: Add Thread, Lower Priority
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sys0_64(SYS_TIME, &ti);
- add_thread(nooptest, 0, 3);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 4: Add Thread, Higher Priority
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sys0_64(SYS_TIME, &ti);
- add_thread(nooptest, 0, 0);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 5: Create Mutex
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sys0_64(SYS_TIME, &ti);
- struct Mutex* m = create_mutex(0);
- sys0_64(SYS_TIME, &tf);
- delete_mutex(m);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 6: Delete Mutex
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- struct Mutex* m = create_mutex(0);
- sys0_64(SYS_TIME, &ti);
- delete_mutex(m);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 7: Lock Mutex
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- struct Mutex* m = create_mutex(0);
- sys0_64(SYS_TIME, &ti);
- lock_mutex(m);
- sys0_64(SYS_TIME, &tf);
- delete_mutex(m);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 7a: Lock Contended Mutex
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- struct Mutex* m = create_mutex(0);
- add_thread(mutex_contention_helper, m, 2);
- sys0(SYS_YIELD);
- sys0_64(SYS_TIME, &ti);
- lock_mutex(m);
- sys0_64(SYS_TIME, &tf);
- delete_mutex(m);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 8: Unlock Mutex
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- struct Mutex* m = create_mutex(0);
- lock_mutex(m);
- sys0_64(SYS_TIME, &ti);
- unlock_mutex(m);
- sys0_64(SYS_TIME, &tf);
- delete_mutex(m);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Semaphore
- static unsigned long sem = 0;
-
- // Test 9: Semaphore Decrease
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sem = 1;
- sys0_64(SYS_TIME, &ti);
- sys1(SYS_SEMAPHORE_P, &sem);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 10: Semaphore Increase
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sem = 0;
- sys0_64(SYS_TIME, &ti);
- sys1(SYS_SEMAPHORE_V, &sem);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
- // Test 10a: Semaphore Increase - No Schedule
- dt = 0;
- for(int i = 0; i < TEST_COUNT; i++) {
- sem = 1;
- sys0_64(SYS_TIME, &ti);
- sys1(SYS_SEMAPHORE_V, &sem);
- sys0_64(SYS_TIME, &tf);
- dt += tf - ti;
- if ((tf-ti) < TEST_BIN_COUNT)
- bins[(tf-ti)]++;
- }
- for (int i = 0; i < TEST_BIN_COUNT; i++) {
- draw_hex32(tidx, y+6+i, i);
- draw_string(tidx+9, y+6+i, TEST_STR_CLR);
- draw_u10(tidx+9, y+6+i, bins[i]);
- bins[i] = 0;
- }
- draw_string(tidx, y+5, " ");
- len = draw_u10(tidx, y+5, dt/TEST_COUNT);
- draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
- tidx += TEST_RESULT_WIDTH;
- draw_hex32(0, y-1, nextpid);
-
-// // Test 7: Tick Latency
-//#define DELAY_TIME 512000
-// unsigned long center = 0;
-// sys0_64(SYS_TIME, &ti);
-// delay(DELAY_TIME);
-// sys0_64(SYS_TIME, &tf);
-// center = (tf - ti - 10);
-// if (10 > (tf-ti))
-// center = 0;
-// dt = 0;
-// unsigned long j = 0;
-// for(int i = 0; i < TEST_COUNT; i++) {
-// sys0_64(SYS_TIME, &ti);
-// delay(DELAY_TIME);
-// sys0_64(SYS_TIME, &tf);
-// dt += tf - ti;
-// if ((tf-ti-center) < TEST_BIN_COUNT)
-// bins[(tf-ti)-center]++;
-// else
-// j++;
-// }
-// for (int i = 0; i < TEST_BIN_COUNT; i++) {
-// draw_hex32(tidx, y+6+i, i);
-// draw_string(tidx+9, y+6+i, TEST_STR_CLR);
-// draw_u10(tidx+9, y+6+i, bins[i]);
-// bins[i] = 0;
-// }
-// draw_hex32(tidx, y+4, j);
-// draw_string(tidx, y+5, " ");
-// len = draw_u10(tidx, y+5, dt/TEST_COUNT);
-// draw_u10(tidx+len+1, y+5, dt%TEST_COUNT);
-// tidx += TEST_RESULT_WIDTH;
-// draw_hex32(0, y-1, nextpid);
-
- add_thread(qualitative_tests, 0, 4);
-}
-
-//static struct Mutex testm = {.addr = 0, .pid = 0};
-static struct Lock testm = {.pid = 0};
-
-void priority_inversion_test1(void);
-void priority_inversion_test2(void);
-void priority_inversion_test3(void);
-void priority_inversion_test4(void);
-
-void priority_inversion_test1(void)
-{
- draw_cletter(x++, y+2, 'S', 0xFF0000);
- // Try Lock
- draw_cletter(x++, y+2, 'T', 0xFF0000);
- lock(&testm);
- // Lock Acquired
- draw_cletter(x++, y+2, 'L', 0xFF0000);
- // Add Thread to Assist with Priority Inversion
- // Check
- // - Show that this thread gets temporarily
- // promoted
- add_thread(priority_inversion_test3, 0, 2);
- // Unlock
- draw_cletter(x++, y+2, 'U', 0xFF0000);
- unlock(&testm);
- draw_cletter(x++, y+2, 'F', 0xFF0000);
-}
-
-void priority_inversion_test2(void)
-{
- draw_cletter(x++, y+0, 'S', 0x0000FF);
- // Add Thread to Assist with Priority Inversion
- // Check
- // - Show that Thread 1 is Prepended To Queue
- add_thread(priority_inversion_test4, 0, 3);
- // Try Lock
- draw_cletter(x++, y+0, 'T', 0x0000FF);
- lock(&testm);
- // Lock Acquired
- draw_cletter(x++, y+0, 'L', 0x0000FF);
- // Unlock
- draw_cletter(x++, y+0, 'U', 0x0000FF);
- unlock(&testm);
- draw_cletter(x++, y+0, 'F', 0x0000FF);
-}
-
-void priority_inversion_test3(void)
-{
- draw_cletter(x++, y+1, 'S', 0x00FF00);
- // Add thread to Assist with Priority Inversion
- // Check
- // - Add high priority thread that will try
- // to lock the mutex
- add_thread(priority_inversion_test2, 0, 1);
- draw_cletter(x++, y+1, 'F', 0x00FF00);
-}
-
-void priority_inversion_test4(void)
-{
- draw_cletter(x++, y+2, 'S', 0xAFAF00);
- // Do nothing,
- // just show that this is executed last
- draw_cletter(x++, y+2, 'F', 0xAFAF00);
-}
-
-static unsigned long test_semaphore = 0;
-
-void semaphore_test1(void)
-{
- draw_cletter(x++, y+1, ' ', 0xFF0000);
- draw_cletter(x++, y+1, 'S', 0xFF0000);
- // Try to decrement semaphore
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- sys1(SYS_SEMAPHORE_P, &test_semaphore);
- // Semaphore decremented
- draw_cletter(x++, y+1, 'P', 0xFF0000);
- draw_cletter(x++, y+1, 'V', 0xFF0000);
- sys1(SYS_SEMAPHORE_V, &test_semaphore);
- draw_cletter(x++, y+1, 'V', 0xFF0000);
- sys1(SYS_SEMAPHORE_V, &test_semaphore);
- draw_cletter(x++, y+1, 'V', 0xFF0000);
- sys1(SYS_SEMAPHORE_V, &test_semaphore);
- // Try to decrement semaphore
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- sys1(SYS_SEMAPHORE_P, &test_semaphore);
- // Semaphore decremented
- draw_cletter(x++, y+1, 'P', 0xFF0000);
- // Try to decrement semaphore
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- sys1(SYS_SEMAPHORE_P, &test_semaphore);
- // Semaphore decremented
- draw_cletter(x++, y+1, 'P', 0xFF0000);
- // Try to decrement semaphore
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- sys1(SYS_SEMAPHORE_P, &test_semaphore);
- // Semaphore decremented
- draw_cletter(x++, y+1, 'P', 0xFF0000);
- // Try to decrement semaphore
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- sys1(SYS_SEMAPHORE_P, &test_semaphore);
- // Semaphore decremented
- draw_cletter(x++, y+1, 'P', 0xFF0000);
- draw_cletter(x++, y+1, 'F', 0xFF0000);
-}
-
-void semaphore_test2(void)
-{
- draw_cletter(x++, y+2, 'S', 0xFF00);
- // Increment semaphore
- draw_cletter(x++, y+2, 'V', 0xFF00);
- sys1(SYS_SEMAPHORE_V, &test_semaphore);
- // Increment semaphore
- draw_cletter(x++, y+2, 'V', 0xFF00);
- sys1(SYS_SEMAPHORE_V, &test_semaphore);
- draw_cletter(x++, y+2, 'F', 0xFF00);
-}
-
-static struct Mutex* dead1 = 0;
-static struct Mutex* dead2 = 0;
-
-void deadlock_test2(void)
-{
- draw_cletter(x++, y+1, 'S', 0xFF0000);
- // Try Lock 1
- draw_cletter(x++, y+1, 'T', 0xFF0000);
- lock_mutex(dead1);
- // Lock 1 Acquired
- draw_cletter(x++, y+1, 'L', 0xFF0000);
- // Try Lock 2
- draw_cletter(x++, y+1, 't', 0xFF0000);
- lock_mutex(dead2);
- // Lock 2 Acquired
- draw_cletter(x++, y+1, 'l', 0xFF0000);
- // Unlock Locks
- draw_cletter(x++, y+1, 'u', 0xFF0000);
- unlock_mutex(dead2);
- draw_cletter(x++, y+1, 'U', 0xFF0000);
- unlock_mutex(dead1);
- draw_cletter(x++, y+1, 'F', 0xFF0000);
-}
-
-void deadlock_test1(void)
-{
- draw_cletter(x++, y+2, ' ', 0xFF00);
- draw_cletter(x++, y+2, 'S', 0xFF00);
- dead1 = create_mutex((void*)0xDEADBEEF);
- dead2 = create_mutex((void*)0x12345678);
- // Try Lock 2
- draw_cletter(x++, y+2, 't', 0xFF00);
- lock_mutex(dead2);
- // Lock 2 Acquired
- draw_cletter(x++, y+2, 'l', 0xFF00);
- // Create Higher priority thread to
- // check deadlock condition
- draw_cletter(x++, y+2, 'A', 0xFF00);
- add_thread(deadlock_test2, 0, 4);
- // Try Lock 1 - This would deadlock
- // if no mechanism is in place to
- // prevent it
- draw_cletter(x++, y+2, 'T', 0xFF00);
- lock_mutex(dead1);
- // Lock 1 Acquired - Deadlock condition
- // properly handled
- draw_cletter(x++, y+2, 'L', 0xFF00);
- // Unlock Locks
- draw_cletter(x++, y+2, 'u', 0xFF00);
- unlock_mutex(dead2);
- draw_cletter(x++, y+2, 'U', 0xFF00);
- unlock_mutex(dead1);
- delete_mutex(dead1);
- delete_mutex(dead2);
- draw_cletter(x++, y+2, 'F', 0xFF00);
-}
-
-void qualitative_tests(void)
-{
- draw_string(0, y+0, " ");
- draw_string(0, y+1, " ");
- draw_string(0, y+2, " ");
- draw_string(0, y+3, " ");
- x = 0;
- add_thread(atest, 0, 0);
- add_thread(priority_inversion_test1, 0, 3);
- add_thread(deadlock_test1, 0, 5);
- add_thread(semaphore_test1, 0, 6);
- add_thread(semaphore_test2, 0, 7);
- add_thread(time_status, 0, 8);
-}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-26 17:35:08 +0000